Constructs a string builder with no characters in it and an initial capacity specified by the capacity argument.
the initial capacity.
NegativeArraySizeException if capacity < 0.
The class of the iterator returned by the iterator method. multiple take, drop, and slice operations on this iterator are bunched together for better efficiency.
A class supporting filtered operations. Instances of this class are returned by method withFilter.
The type implementing this traversable
Test two objects for inequality.
true if !(this == that), false otherwise.
Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.
a hash value consistent with ==
Return the current string concatenated n times.
Returns a new traversable collection containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the traversable collection is the most specific superclass encompassing the element types of the two operands.
the element type of the returned collection.
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
the traversable to append.
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
a new collection of type That which contains all elements of this traversable collection followed by all elements of that.
As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
Example:
scala> val x = List(1) x: List[Int] = List(1) scala> val y = LinkedList(2) y: scala.collection.mutable.LinkedList[Int] = LinkedList(2) scala> val z = x ++: y z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.
Since TraversableOnce has no ++ method, we have to implement that directly, but Traversable and down can use the overload.
the element type of the returned collection.
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
the traversable to append.
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
a new collection of type That which contains all elements of this traversable collection followed by all elements of that.
As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
Example:
scala> val x = List(1) x: List[Int] = List(1) scala> val y = LinkedList(2) y: scala.collection.mutable.LinkedList[Int] = LinkedList(2) scala> val z = x ++: y z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
the element type of the returned collection.
the traversable to append.
a new string builder which contains all elements of this string builder followed by all elements of that.
adds all elements produced by a TraversableOnce to this growable collection.
the TraversableOnce producing the elements to add.
the growable collection itself.
A copy of the string builder with an element prepended.
Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Also, the original string builder is not modified, so you will want to capture the result.
Example:
scala> val x = List(1) x: List[Int] = List(1) scala> val y = 2 +: x y: List[Int] = List(2, 1) scala> println(x) List(1)
the prepended element
a new string builder consisting of elem followed by all elements of this string builder.
Appends the given Char to the end of the sequence.
the builder itself.
adds two or more elements to this growable collection.
the first element to add.
the second element to add.
the remaining elements to add.
the growable collection itself
Applies a binary operator to a start value and all elements of this traversable or iterator, going left to right.
Note: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.
Examples:
Note that the folding function used to compute b is equivalent to that used to compute c.
scala> val a = List(1,2,3,4) a: List[Int] = List(1, 2, 3, 4) scala> val b = (5 /: a)(_+_) b: Int = 15 scala> val c = (5 /: a)((x,y) => x + y) c: Int = 15
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.
the result type of the binary operator.
the start value.
the binary operator.
the result of inserting op between consecutive elements of this traversable or iterator, going left to right with the start value z on the left:
op(...op(op(z, x_1), x_2), ..., x_n)
where x1, ..., xn are the elements of this traversable or iterator.
A copy of this string builder with an element appended.
A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Example:
scala> val a = List(1) a: List[Int] = List(1) scala> val b = a :+ 2 b: List[Int] = List(1, 2) scala> println(a) List(1)
the appended element
a new string builder consisting of all elements of this string builder followed by elem.
Applies a binary operator to all elements of this traversable or iterator and a start value, going right to left.
Note: :\ is alternate syntax for foldRight; xs :\ z is the same as xs foldRight z.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.
Examples:
Note that the folding function used to compute b is equivalent to that used to compute c.
scala> val a = List(1,2,3,4) a: List[Int] = List(1, 2, 3, 4) scala> val b = (a :\ 5)(_+_) b: Int = 15 scala> val c = (a :\ 5)((x,y) => x + y) c: Int = 15
the result type of the binary operator.
the start value
the binary operator
the result of inserting op between consecutive elements of this traversable or iterator, going right to left with the start value z on the right:
op(x_1, op(x_2, ... op(x_n, z)...))
where x1, ..., xn are the elements of this traversable or iterator.
Returns true if this is less than that
Returns true if this is less than or equal to that.
The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
true if the receiver object is equivalent to the argument; false otherwise.
Returns true if this is greater than that.
Returns true if this is greater than or equal to that.
Appends all elements of this traversable or iterator to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable or iterator without any separator string.
Example:
scala> val a = List(1,2,3,4) a: List[Int] = List(1, 2, 3, 4) scala> val b = new StringBuilder() b: StringBuilder = scala> val h = a.addString(b) h: StringBuilder = 1234
the string builder to which elements are appended.
the string builder b to which elements were appended.
Appends all elements of this traversable or iterator to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable or iterator, separated by the string sep.
Example:
scala> val a = List(1,2,3,4) a: List[Int] = List(1, 2, 3, 4) scala> val b = new StringBuilder() b: StringBuilder = scala> a.addString(b, ", ") res0: StringBuilder = 1, 2, 3, 4
the string builder to which elements are appended.
the separator string.
the string builder b to which elements were appended.
Appends all elements of this traversable or iterator to a string builder using start, end, and separator strings. The written text begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this traversable or iterator are separated by the string sep.
Example:
scala> val a = List(1,2,3,4)
a: List[Int] = List(1, 2, 3, 4)
scala> val b = new StringBuilder()
b: StringBuilder =
scala> a.addString(b , "List(" , ", " , ")")
res5: StringBuilder = List(1, 2, 3, 4)
the string builder to which elements are appended.
the starting string.
the separator string.
the ending string.
the string builder b to which elements were appended.
Aggregates the results of applying an operator to subsequent elements.
This is a more general form of fold and reduce. It is similar to foldLeft in that it doesn't require the result to be a supertype of the element type. In addition, it allows parallel collections to be processed in chunks, and then combines the intermediate results.
aggregate splits the traversable or iterator into partitions and processes each partition by sequentially applying seqop, starting with z (like foldLeft). Those intermediate results are then combined by using combop (like fold). The implementation of this operation may operate on an arbitrary number of collection partitions (even 1), so combop may be invoked an arbitrary number of times (even 0).
As an example, consider summing up the integer values of a list of chars. The initial value for the sum is 0. First, seqop transforms each input character to an Int and adds it to the sum (of the partition). Then, combop just needs to sum up the intermediate results of the partitions:
List('a', 'b', 'c').aggregate(0)({ (sum, ch) => sum + ch.toInt }, { (p1, p2) => p1 + p2 })
the type of accumulated results
the initial value for the accumulated result of the partition - this will typically be the neutral element for the seqop operator (e.g. Nil for list concatenation or 0 for summation) and may be evaluated more than once
an operator used to accumulate results within a partition
an associative operator used to combine results from different partitions
Composes this partial function with a transformation function that gets applied to results of this partial function.
the result type of the transformation function.
the transformation function
a partial function with the same domain as this partial function, which maps arguments x to k(this(x)).
Append the String representation of the given primitive type to this sequence. The argument is converted to a String with String.valueOf.
a primitive value
This StringBuilder.
Appends the given String to this sequence.
a String.
this StringBuilder.
Appends the string representation of the given argument, which is converted to a String with String.valueOf.
an Any object.
this StringBuilder.
Appends a portion of the given Array[Char] to this sequence.
the Array containing Chars to be appended.
the index of the first Char to append.
the numbers of Chars to append.
this StringBuilder.
Appends all the Chars in the given Array[Char] to this sequence.
the characters to be appended.
a reference to this object.
Appends all the Chars in the given Seq[Char] to this sequence.
the characters to be appended.
this StringBuilder.
Equivalent to charAt.
the element of this string builder at index idx, where 0 indicates the first element.
Applies this partial function to the given argument when it is contained in the function domain. Applies fallback function where this partial function is not defined.
Note that expression pf.applyOrElse(x, default) is equivalent to
if(pf isDefinedAt x) pf(x) else default(x)
except that applyOrElse method can be implemented more efficiently. For all partial function literals the compiler generates an applyOrElse implementation which avoids double evaluation of pattern matchers and guards. This makes applyOrElse the basis for the efficient implementation for many operations and scenarios, such as:
orElse/andThen chains does not lead to excessive apply/isDefinedAt evaluation
lift and unlift do not evaluate source functions twice on each invocation
runWith allows efficient imperative-style combining of partial functions with conditionally applied actions For non-literal partial function classes with nontrivial isDefinedAt method it is recommended to override applyOrElse with custom implementation that avoids double isDefinedAt evaluation. This may result in better performance and more predictable behavior w.r.t. side effects.
the function argument
the fallback function
the result of this function or fallback function application.
2.10
Cast the receiver object to be of type T0.
Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.
the receiver object.
ClassCastException if the receiver object is not an instance of the erasure of type T0.
Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.
The object with which this iterable collection should be compared
true, if this iterable collection can possibly equal that, false otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.
Returns the current capacity, which is the size of the underlying array. A new array will be allocated if the current capacity is exceeded.
the capacity
Returns this string with first character converted to upper case. If the first character of the string is capitalized, it is returned unchanged. This method does not convert characters outside the Basic Multilingual Plane (BMP).
Returns the Char at the specified index, counting from 0 as in Arrays.
the index to look up
the Char at the given index.
IndexOutOfBoundsException if the index is out of bounds.
Clears the builder contents.
Create a copy of the receiver object.
The default implementation of the clone method is platform dependent.
a copy of the receiver object.
not specified by SLS as a member of AnyRef
Builds a new collection by applying a partial function to all elements of this string builder on which the function is defined.
the element type of the returned collection.
the partial function which filters and maps the string builder.
a new string builder resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.
Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.
Note: may not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
the partial function
an option value containing pf applied to the first value for which it is defined, or None if none exists.
Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)
Iterates over combinations. A _combination_ of length n is a subsequence of the original sequence, with the elements taken in order. Thus, "xy" and "yy" are both length-2 combinations of "xyy", but "yx" is not. If there is more than one way to generate the same subsequence, only one will be returned.
For example, "xyyy" has three different ways to generate "xy" depending on whether the first, second, or third "y" is selected. However, since all are identical, only one will be chosen. Which of the three will be taken is an implementation detail that is not defined.
An Iterator which traverses the possible n-element combinations of this sequence.
"abbbc".combinations(2) = Iterator(ab, ac, bb, bc)
The factory companion object that builds instances of class IndexedSeq. (or its Iterable superclass where class IndexedSeq is not a Seq.)
Result of comparing this with operand that.
Implement this method to determine how instances of A will be sorted.
Returns x where:
x < 0 when this < that
x == 0 when this == that
x > 0 when this > that
Result of comparing this with operand that.
Composes two instances of Function1 in a new Function1, with this function applied last.
the type to which function g can be applied
a function A => T1
a new function f such that f(x) == apply(g(x))
Tests whether this sequence contains a given value as an element.
Note: may not terminate for infinite-sized collections.
the element to test.
true if this sequence has an element that is equal (as determined by ==) to elem, false otherwise.
Tests whether this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
the sequence to test
true if this sequence contains a slice with the same elements as that, otherwise false.
Copies the elements of this string builder to an array. Fills the given array xs with at most len elements of this string builder, starting at position start. Copying will stop once either the end of the current string builder is reached, or the end of the target array is reached, or len elements have been copied.
the array to fill.
the starting index.
the maximal number of elements to copy.
Copies the elements of this string builder to an array. Fills the given array xs with values of this string builder. Copying will stop once either the end of the current string builder is reached, or the end of the target array is reached.
the array to fill.
Copies the elements of this string builder to an array. Fills the given array xs with values of this string builder, beginning at index start. Copying will stop once either the end of the current string builder is reached, or the end of the target array is reached.
the array to fill.
the starting index.
Copies all elements of this traversable or iterator to a buffer.
Note: will not terminate for infinite-sized collections.
The buffer to which elements are copied.
Tests whether every element of this sequence relates to the corresponding element of another sequence by satisfying a test predicate.
the type of the elements of that
the other sequence
the test predicate, which relates elements from both sequences
true if both sequences have the same length and p(x, y) is true for all corresponding elements x of this sequence and y of that, otherwise false.
Counts the number of elements in the traversable or iterator which satisfy a predicate.
the predicate used to test elements.
the number of elements satisfying the predicate p.
Remove a subsequence of Chars from this sequence, starting at the given start index (inclusive) and extending to the end index (exclusive) or to the end of the String, whichever comes first.
The beginning index, inclusive.
The ending index, exclusive.
This StringBuilder.
StringIndexOutOfBoundsException if start < 0 || start > end
Removes the Char at the specified index. The sequence is shortened by one.
The index to remove.
This StringBuilder.
IndexOutOfBoundsException if the index is out of bounds.
Computes the multiset difference between this string builder and another sequence.
the sequence of elements to remove
a new string builder which contains all elements of this string builder except some of occurrences of elements that also appear in that. If an element value x appears n times in that, then the first n occurrences of x will not form part of the result, but any following occurrences will.
Builds a new sequence from this sequence without any duplicate elements.
Note: will not terminate for infinite-sized collections.
A new sequence which contains the first occurrence of every element of this sequence.
Selects all elements except first n ones.
the number of elements to drop from this sequence.
a sequence consisting of all elements of this sequence except the first n ones, or else the empty sequence, if this sequence has less than n elements. If n is negative, don't drop any elements.
Selects all elements except last n ones.
The number of elements to take
a sequence consisting of all elements of this sequence except the last n ones, or else the empty sequence, if this sequence has less than n elements.
Drops longest prefix of elements that satisfy a predicate.
the longest suffix of this sequence whose first element does not satisfy the predicate p.
Tests whether this sequence ends with the given sequence.
the sequence to test
true if this sequence has that as a suffix, false otherwise.
Ensure that the capacity is at least the given argument. If the argument is greater than the current capacity, new storage will be allocated with size equal to the given argument or to (2 * capacity + 2), whichever is larger.
the minimum desired capacity.
Tests whether the argument (that) is a reference to the receiver object (this).
The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:
x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
null.eq(null) returns true. When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).
true if the argument is a reference to the receiver object; false otherwise.
The equals method for arbitrary sequences. Compares this sequence to some other object.
The object to compare the sequence to
true if that is a sequence that has the same elements as this sequence in the same order, false otherwise
Tests whether a predicate holds for at least one element of this sequence.
the predicate used to test elements.
false if this sequence is empty, otherwise true if the given predicate p holds for some of the elements of this sequence, otherwise false
Selects all elements of this traversable collection which satisfy a predicate.
the predicate used to test elements.
a new traversable collection consisting of all elements of this traversable collection that satisfy the given predicate p. The order of the elements is preserved.
Selects all elements of this traversable collection which do not satisfy a predicate.
the predicate used to test elements.
a new traversable collection consisting of all elements of this traversable collection that do not satisfy the given predicate p. The order of the elements is preserved.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.
not specified by SLS as a member of AnyRef
Finds the first element of the sequence satisfying a predicate, if any.
the predicate used to test elements.
an option value containing the first element in the sequence that satisfies p, or None if none exists.
Builds a new collection by applying a function to all elements of this string builder and using the elements of the resulting collections.
For example:
def getWords(lines: Seq[String]): Seq[String] = lines flatMap (line => line split "\\W+")
The type of the resulting collection is guided by the static type of string builder. This might cause unexpected results sometimes. For example:
// lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)
// lettersOf will return a Set[Char], not a Seq
def lettersOf(words: Seq[String]) = words.toSet flatMap (word => word.toSeq)
// xs will be an Iterable[Int]
val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)
// ys will be a Map[Int, Int]
val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
the element type of the returned collection.
the function to apply to each element.
a new string builder resulting from applying the given collection-valued function f to each element of this string builder and concatenating the results.
Converts this string builder of traversable collections into a string builder formed by the elements of these traversable collections.
The resulting collection's type will be guided by the static type of string builder. For example:
val xs = List(
Set(1, 2, 3),
Set(1, 2, 3)
).flatten
// xs == List(1, 2, 3, 1, 2, 3)
val ys = Set(
List(1, 2, 3),
List(3, 2, 1)
).flatten
// ys == Set(1, 2, 3)
the type of the elements of each traversable collection.
a new string builder resulting from concatenating all element string builders.
Folds the elements of this traversable or iterator using the specified associative binary operator.
The order in which operations are performed on elements is unspecified and may be nondeterministic.
Note: will not terminate for infinite-sized collections.
a type parameter for the binary operator, a supertype of A.
a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., Nil for list concatenation, 0 for addition, or 1 for multiplication).
a binary operator that must be associative.
the result of applying the fold operator op between all the elements and z, or z if this traversable or iterator is empty.
Applies a binary operator to a start value and all elements of this sequence, going left to right.
the result type of the binary operator.
the start value.
the binary operator.
the result of inserting op between consecutive elements of this sequence, going left to right with the start value z on the left:
op(...op(z, x_1), x_2, ..., x_n)
where x1, ..., xn are the elements of this sequence. Returns z if this sequence is empty.
Applies a binary operator to all elements of this sequence and a start value, going right to left.
the result type of the binary operator.
the start value.
the binary operator.
the result of inserting op between consecutive elements of this sequence, going right to left with the start value z on the right:
op(x_1, op(x_2, ... op(x_n, z)...))
where x1, ..., xn are the elements of this sequence. Returns z if this sequence is empty.
Tests whether a predicate holds for all elements of this sequence.
the predicate used to test elements.
true if this sequence is empty or the given predicate p holds for all elements of this sequence, otherwise false.
Applies a function f to all elements of this string builder.
Note: this method underlies the implementation of most other bulk operations. Subclasses should re-implement this method if a more efficient implementation exists.
the function that is applied for its side-effect to every element. The result of function f is discarded.
Uses the underlying string as a pattern (in a fashion similar to printf in C), and uses the supplied arguments to fill in the holes.
The interpretation of the formatting patterns is described in java.util.Formatter, with the addition that classes deriving from ScalaNumber (such as scala.BigInt and scala.BigDecimal) are unwrapped to pass a type which Formatter understands.
the arguments used to instantiating the pattern.
Like format(args*) but takes an initial Locale parameter which influences formatting as in java.lang.String's format.
The interpretation of the formatting patterns is described in java.util.Formatter, with the addition that classes deriving from ScalaNumber (such as scala.BigInt and scala.BigDecimal) are unwrapped to pass a type which Formatter understands.
an instance of java.util.Locale
the arguments used to instantiating the pattern.
Returns string formatted according to given format string. Format strings are as for String.format (@see java.lang.String.format).
The generic builder that builds instances of Traversable at arbitrary element types.
Returns the runtime class representation of the object.
a class object corresponding to the runtime type of the receiver.
Partitions this traversable collection into a map of traversable collections according to some discriminator function.
Note: this method is not re-implemented by views. This means when applied to a view it will always force the view and return a new traversable collection.
the type of keys returned by the discriminator function.
the discriminator function.
A map from keys to traversable collections such that the following invariant holds:
(xs groupBy f)(k) = xs filter (x => f(x) == k)
That is, every key k is bound to a traversable collection of those elements x for which f(x) equals k.
Partitions elements in fixed size iterable collections.
the number of elements per group
An iterator producing iterable collections of size size, except the last will be less than size size if the elements don't divide evenly.
scala.collection.Iterator, method grouped
Tests whether this traversable collection is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end. Non-empty Iterators usually return false even if they were created from a collection with a known finite size.
Note: many collection methods will not work on collections of infinite sizes. The typical failure mode is an infinite loop. These methods always attempt a traversal without checking first that hasDefiniteSize returns true. However, checking hasDefiniteSize can provide an assurance that size is well-defined and non-termination is not a concern.
true if this collection is known to have finite size, false otherwise.
Hashcodes for IndexedSeq produce a value from the hashcodes of all the elements of the sequence.
the hash code value for this object.
Selects the first element of this sequence.
the first element of this sequence.
NoSuchElementException if the sequence is empty.
Optionally selects the first element.
Note: might return different results for different runs, unless the underlying collection type is ordered.
the first element of this traversable collection if it is nonempty, None if it is empty.
Finds the index of the first occurrence of the specified substring.
the target string to search for
the smallest index in the source string to consider
the first applicable index where target occurs, or -1 if not found.
Finds the index of the first occurrence of the specified substring.
the target string to search for
the first applicable index where target occurs, or -1 if not found.
Finds index of first occurrence of some value in this string builder after or at some start index.
the element value to search for.
the start index
the index >= from of the first element of this string builder that is equal (as determined by ==) to elem, or -1, if none exists.
Finds index of first occurrence of some value in this string builder.
the element value to search for.
the index of the first element of this string builder that is equal (as determined by ==) to elem, or -1, if none exists.
Finds first index after or at a start index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
the sequence to test
the start index
the first index >= from such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.
Finds first index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
the sequence to test
the first index such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.
Finds index of the first element satisfying some predicate after or at some start index.
the predicate used to test elements.
the start index
the index >= from of the first element of this sequence that satisfies the predicate p, or -1, if none exists.
Finds index of first element satisfying some predicate.
Note: may not terminate for infinite-sized collections.
the predicate used to test elements.
the index of the first element of this general sequence that satisfies the predicate p, or -1, if none exists.
Produces the range of all indices of this sequence.
a Range value from 0 to one less than the length of this sequence.
Selects all elements except the last.
a sequence consisting of all elements of this sequence except the last one.
UnsupportedOperationException if the sequence is empty.
Iterates over the inits of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of init.
an iterator over all the inits of this traversable collection
List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)
Calls String.valueOf on the given primitive value, and inserts the String at the given index.
the offset position.
a primitive value.
this StringBuilder.
Inserts the String into this character sequence.
the index at which to insert.
a String.
this StringBuilder.
StringIndexOutOfBoundsException if the index is out of bounds.
Inserts the String representation (via String.valueOf) of the given argument into this sequence at the given index.
the index at which to insert.
a value.
this StringBuilder.
StringIndexOutOfBoundsException if the index is out of bounds.
Inserts the given Array[Char] into this sequence at the given index.
the index at which to insert.
the Array[Char].
this StringBuilder.
StringIndexOutOfBoundsException if the index is out of bounds.
Inserts the given Seq[Char] into this sequence at the given index.
the index at which to insert.
the Seq[Char].
this StringBuilder.
StringIndexOutOfBoundsException if the index is out of bounds.
Inserts a subarray of the given Array[Char] at the given index of this sequence.
index at which to insert the subarray.
the Array from which Chars will be taken.
the index of the first Char to insert.
the number of Chars from 'str' to insert.
This StringBuilder.
StringIndexOutOfBoundsException if index < 0, index > length, offset < 0, len < 0, or (offset + len) > str.length.
Computes the multiset intersection between this string builder and another sequence.
the sequence of elements to intersect with.
a new string builder which contains all elements of this string builder which also appear in that. If an element value x appears n times in that, then the first n occurrences of x will be retained in the result, but any following occurrences will be omitted.
Tests whether this general sequence contains given index.
The implementations of methods apply and isDefinedAt turn a Seq[A] into a PartialFunction[Int, A].
the index to test
true if this general sequence contains an element at position idx, false otherwise.
Tests whether this sequence is empty.
true if the sequence contain no elements, false otherwise.
Test whether the dynamic type of the receiver object is T0.
Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.
true if the receiver object is an instance of erasure of type T0; false otherwise.
Tests whether this traversable collection can be repeatedly traversed.
true
Creates a new iterator over all elements contained in this iterable object.
the new iterator
Selects the last element.
The last element of this sequence.
NoSuchElementException If the sequence is empty.
Finds the index of the last occurrence of the specified substring.
the target string to search for
the smallest index in the source string to consider
the last applicable index where target occurs, or -1 if not found.
Finds the index of the last occurrence of the specified substring.
the target string to search for
the last applicable index where target occurs, or -1 if not found.
Finds index of last occurrence of some value in this string builder before or at a given end index.
the element value to search for.
the end index.
the index <= end of the last element of this string builder that is equal (as determined by ==) to elem, or -1, if none exists.
Finds index of last occurrence of some value in this string builder.
the element value to search for.
the index of the last element of this string builder that is equal (as determined by ==) to elem, or -1, if none exists.
Finds last index before or at a given end index where this sequence contains a given sequence as a slice.
the sequence to test
the end index
the last index <= end such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.
Finds last index where this sequence contains a given sequence as a slice.
Note: will not terminate for infinite-sized collections.
the sequence to test
the last index such that the elements of this sequence starting a this index match the elements of sequence that, or -1 of no such subsequence exists.
Finds index of last element satisfying some predicate before or at given end index.
the predicate used to test elements.
the index <= end of the last element of this sequence that satisfies the predicate p, or -1, if none exists.
Finds index of last element satisfying some predicate.
Note: will not terminate for infinite-sized collections.
the predicate used to test elements.
the index of the last element of this general sequence that satisfies the predicate p, or -1, if none exists.
Optionally selects the last element.
Note: might return different results for different runs, unless the underlying collection type is ordered.
the last element of this traversable collection$ if it is nonempty, None if it is empty.
The length of the string builder.
Note: xs.length and xs.size yield the same result.
the number of elements in this string builder.
IllegalArgumentException if the length of the sequence cannot be represented in an Int, for example, (-1 to Int.MaxValue).length.
Compares the length of this sequence to a test value.
the test value that gets compared with the length.
A value x where
x < 0 if this.length < len x == 0 if this.length == len x > 0 if this.length > len
The method as implemented here does not call length directly; its running time is O(length min len) instead of O(length). The method should be overwritten if computing length is cheap.
Turns this partial function into a plain function returning an Option result.
a function that takes an argument x to Some(this(x)) if this is defined for x, and to None otherwise.
Function.unlift
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply .stripLineEnd to all lines returned by linesWithSeparators.
Return all lines in this string in an iterator, excluding trailing line end characters; i.e., apply .stripLineEnd to all lines returned by linesWithSeparators.
Return all lines in this string in an iterator, including trailing line end characters.
This method is analogous to s.split(EOL).toIterator, except that any existing line endings are preserved in the result strings, and the empty string yields an empty iterator.
A line end character is one of
LF - line feed (0x0A)
FF - form feed (0x0C) Builds a new collection by applying a function to all elements of this string builder.
the element type of the returned collection.
the function to apply to each element.
a new string builder resulting from applying the given function f to each element of this string builder and collecting the results.
Creates a new builder by applying a transformation function to the results of this builder.
the type of collection returned by f.
the transformation function.
a new builder which is the same as the current builder except that a transformation function is applied to this builder's result.
The original builder should no longer be used after mapResult is called.
Finds the largest element.
the largest element of this string builder.
UnsupportedOperationException if this string builder is empty.
Finds the first element which yields the largest value measured by function f.
The result type of the function f.
The measuring function.
the first element of this string builder with the largest value measured by function f.
UnsupportedOperationException if this string builder is empty.
Finds the smallest element.
the smallest element of this string builder
UnsupportedOperationException if this string builder is empty.
Finds the first element which yields the smallest value measured by function f.
The result type of the function f.
The measuring function.
the first element of this string builder with the smallest value measured by function f.
UnsupportedOperationException if this string builder is empty.
Returns a new String representing the data in this sequence.
the current contents of this sequence as a String
Displays all elements of this traversable or iterator in a string using a separator string.
the separator string.
a string representation of this traversable or iterator. In the resulting string the string representations (w.r.t. the method toString) of all elements of this traversable or iterator are separated by the string sep.
List(1, 2, 3).mkString("|") = "1|2|3"
Displays all elements of this traversable or iterator in a string using start, end, and separator strings.
the starting string.
the separator string.
the ending string.
a string representation of this traversable or iterator. The resulting string begins with the string start and ends with the string end. Inside, the string representations (w.r.t. the method toString) of all elements of this traversable or iterator are separated by the string sep.
List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"
Equivalent to !(this eq that).
true if the argument is not a reference to the receiver object; false otherwise.
Creates a string builder buffer as builder for this class
Tests whether the traversable or iterator is not empty.
true if the traversable or iterator contains at least one element, false otherwise.
Wakes up a single thread that is waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Wakes up all threads that are waiting on the receiver object's monitor.
not specified by SLS as a member of AnyRef
Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.
the argument type of the fallback function
the result type of the fallback function
the fallback function
a partial function which has as domain the union of the domains of this partial function and that. The resulting partial function takes x to this(x) where this is defined, and to that(x) where it is not.
A copy of this string builder with an element value appended until a given target length is reached.
the target length
the padding value
a new string builder consisting of all elements of this string builder followed by the minimal number of occurrences of elem so that the resulting string builder has a length of at least len.
Returns a parallel implementation of this collection.
For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.
Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.
All parallel collections return a reference to themselves.
a parallel implementation of this collection
The default par implementation uses the combiner provided by this method to create a new parallel collection.
a combiner for the parallel collection of type ParRepr
Partitions this traversable collection in two traversable collections according to a predicate.
the predicate on which to partition.
a pair of traversable collections: the first traversable collection consists of all elements that satisfy the predicate p and the second traversable collection consists of all elements that don't. The relative order of the elements in the resulting traversable collections is the same as in the original traversable collection.
Produces a new string builder where a slice of elements in this string builder is replaced by another sequence.
the index of the first replaced element
the number of elements to drop in the original string builder
a new string builder consisting of all elements of this string builder except that replaced elements starting from from are replaced by patch.
Iterates over distinct permutations.
An Iterator which traverses the distinct permutations of this sequence.
"abb".permutations = Iterator(abb, bab, bba)
Returns the length of the longest prefix whose elements all satisfy some predicate.
Note: may not terminate for infinite-sized collections.
the predicate used to test elements.
the length of the longest prefix of this general sequence such that every element of the segment satisfies the predicate p.
Multiplies up the elements of this collection.
the product of all elements in this string builder of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the string builder and as result type of product. Examples of such types are: Long, Float, Double, BigInt.
You can follow a string with .r(g1, ... , gn), turning it into a Regex, with group names g1 through gn.
"""(\d\d)-(\d\d)-(\d\d\d\d)""".r("month", "day", "year") matches dates and provides its subcomponents through groups named "month", "day" and "year".
The names of the groups in the pattern, in the order they appear.
You can follow a string with .r, turning it into a Regex. E.g.
"""A\w*""".r is the regular expression for identifiers starting with A.
Reduces the elements of this traversable or iterator using the specified associative binary operator.
The order in which operations are performed on elements is unspecified and may be nondeterministic.
A type parameter for the binary operator, a supertype of A.
A binary operator that must be associative.
The result of applying reduce operator op between all the elements if the traversable or iterator is nonempty.
UnsupportedOperationException if this traversable or iterator is empty.
Applies a binary operator to all elements of this sequence, going left to right.
the result type of the binary operator.
the binary operator.
the result of inserting op between consecutive elements of this sequence, going left to right:
op( op( ... op(x_1, x_2) ..., x_{n-1}), x_n)
where x1, ..., xn are the elements of this sequence.
UnsupportedOperationException if this sequence is empty.
Optionally applies a binary operator to all elements of this traversable or iterator, going left to right.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.
the result type of the binary operator.
the binary operator.
an option value containing the result of reduceLeft(op) if this traversable or iterator is nonempty, None otherwise.
Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.
The order in which operations are performed on elements is unspecified and may be nondeterministic.
A type parameter for the binary operator, a supertype of A.
A binary operator that must be associative.
An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.
Applies a binary operator to all elements of this sequence, going right to left.
the result type of the binary operator.
the binary operator.
the result of inserting op between consecutive elements of this sequence, going right to left:
op(x_1, op(x_2, ..., op(x_{n-1}, x_n)...))
where x1, ..., xn are the elements of this sequence.
UnsupportedOperationException if this sequence is empty.
Optionally applies a binary operator to all elements of this traversable or iterator, going right to left.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.
the result type of the binary operator.
the binary operator.
an option value containing the result of reduceRight(op) if this traversable or iterator is nonempty, None otherwise.
Replaces a subsequence of Chars with the given String. The semantics are as in delete, with the String argument then inserted at index 'start'.
The beginning index, inclusive.
The ending index, exclusive.
The String to be inserted at the start index.
This StringBuilder.
StringIndexOutOfBoundsException if start < 0, start > length, or start > end
Replace all literal occurrences of literal with the literal string replacement. This method is equivalent to java.lang.String#replace.
the string which should be replaced everywhere it occurs
the replacement string
the resulting string
The collection of type traversable collection underlying this TraversableLike object. By default this is implemented as the TraversableLike object itself, but this can be overridden.
Returns the result of this Builder (a String).
If this method is called multiple times, each call will result in a snapshot of the buffer at that point in time. In particular, a StringBuilder can be used to build multiple independent strings by emptying the buffer with clear after each call to result.
the string assembled by this StringBuilder
Creates a new StringBuilder with the reversed contents of this one. If surrogate pairs are present, they are treated as indivisible units: each pair will appear in the same order in the updated sequence.
the reversed StringBuilder
(Changed in version 2.8.0) reverse returns a new instance. Use reverseContents to update in place and return that StringBuilder itself.
Like reverse, but destructively updates the target StringBuilder.
the reversed StringBuilder (same as the target StringBuilder)
An iterator yielding elements in reversed order.
Note: xs.reverseIterator is the same as xs.reverse.iterator but might be more efficient.
an iterator yielding the elements of this sequence in reversed order
Builds a new collection by applying a function to all elements of this string builder and collecting the results in reversed order.
Note: xs.reverseMap(f) is the same as xs.reverse.map(f) but might be more efficient.
the element type of the returned collection.
the function to apply to each element.
a new string builder resulting from applying the given function f to each element of this string builder and collecting the results in reversed order.
Composes this partial function with an action function which gets applied to results of this partial function. The action function is invoked only for its side effects; its result is ignored.
Note that expression pf.runWith(action)(x) is equivalent to
if(pf isDefinedAt x) { action(pf(x)); true } else false
except that runWith is implemented via applyOrElse and thus potentially more efficient. Using runWith avoids double evaluation of pattern matchers and guards for partial function literals.
the action function
a function which maps arguments x to isDefinedAt(x). The resulting function runs action(this(x)) where this is defined.
2.10
applyOrElse.
Checks if the other iterable collection contains the same elements in the same order as this string builder.
the collection to compare with.
true, if both collections contain the same elements in the same order, false otherwise.
Computes a prefix scan of the elements of the collection.
Note: The neutral element z may be applied more than once.
element type of the resulting collection
type of the resulting collection
neutral element for the operator op
the associative operator for the scan
combiner factory which provides a combiner
a new traversable collection containing the prefix scan of the elements in this traversable collection
Produces a collection containing cumulative results of applying the operator going left to right.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
the type of the elements in the resulting collection
the actual type of the resulting collection
the initial value
the binary operator applied to the intermediate result and the element
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
collection with intermediate results
Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
Example:
List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
the type of the elements in the resulting collection
the actual type of the resulting collection
the initial value
the binary operator applied to the intermediate result and the element
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
collection with intermediate results
(Changed in version 2.9.0) The behavior of scanRight has changed. The previous behavior can be reproduced with scanRight.reverse.
Computes length of longest segment whose elements all satisfy some predicate.
the predicate used to test elements.
the index where the search starts.
the length of the longest segment of this sequence starting from index from such that every element of the segment satisfies the predicate p.
A version of this collection with all of the operations implemented sequentially (i.e., in a single-threaded manner).
This method returns a reference to this collection. In parallel collections, it is redefined to return a sequential implementation of this collection. In both cases, it has O(1) complexity.
a sequential view of the collection.
Update the sequence at the given index to hold the specified Char.
the index to modify.
the new Char.
IndexOutOfBoundsException if the index is out of bounds.
Sets the length of the character sequence. If the current sequence is shorter than the given length, it is padded with nulls; if it is longer, it is truncated.
the new length
IndexOutOfBoundsException if the argument is negative.
The size of this sequence, equivalent to length.
Note: will not terminate for infinite-sized collections.
the number of elements in this sequence.
Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection is known to have a cheap size method. Currently this is assumed to be the case if and only if the collection is of type IndexedSeqLike. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.
the collection which serves as a hint for the result's size.
a correction to add to the coll.size to produce the size hint.
Gives a hint that one expects the result of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection is known to have a cheap size method, which is determined by calling sizeHint.
Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.
the collection which serves as a hint for the result's size.
Gives a hint how many elements are expected to be added when the next result is called. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.
the hint how many elements will be added.
Gives a hint how many elements are expected to be added when the next result is called, together with an upper bound given by the size of some other collection. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.
the hint how many elements will be added.
the bounding collection. If it is an IndexedSeqLike, then sizes larger than collection's size are reduced.
The size of this sequence, if it can be cheaply computed
the number of elements in this sequence, or -1 if the size cannot be determined cheaply
Selects an interval of elements. The returned collection is made up of all elements x which satisfy the invariant:
from <= indexOf(x) < until
a string containing the elements greater than or equal to index from extending up to (but not including) index until of this string.
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
the number of elements per group
the distance between the first elements of successive groups
An iterator producing iterable collections of size size, except the last element (which may be the only element) will be truncated if there are fewer than size elements remaining to be grouped.
scala.collection.Iterator, method sliding
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) The "sliding window" step is set to one.
the number of elements per group
An iterator producing iterable collections of size size, except the last element (which may be the only element) will be truncated if there are fewer than size elements remaining to be grouped.
scala.collection.Iterator, method sliding
Sorts this Seq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
the target type of the transformation f, and the type where the ordering ord is defined.
the transformation function mapping elements to some other domain B.
the ordering assumed on domain B.
a sequence consisting of the elements of this sequence sorted according to the ordering where x < y if ord.lt(f(x), f(y)).
val words = "The quick brown fox jumped over the lazy dog".split(' ')
// this works because scala.Ordering will implicitly provide an Ordering[Tuple2[Int, Char]]
words.sortBy(x => (x.length, x.head))
res0: Array[String] = Array(The, dog, fox, the, lazy, over, brown, quick, jumped)
scala.math.Ordering Note: will not terminate for infinite-sized collections.
Sorts this sequence according to a comparison function.
Note: will not terminate for infinite-sized collections.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
the comparison function which tests whether its first argument precedes its second argument in the desired ordering.
a sequence consisting of the elements of this sequence sorted according to the comparison function lt.
List("Steve", "Tom", "John", "Bob").sortWith(_.compareTo(_) < 0) =
List("Bob", "John", "Steve", "Tom")
Sorts this sequence according to an Ordering.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
the ordering to be used to compare elements.
a sequence consisting of the elements of this sequence sorted according to the ordering ord.
Splits this sequence into a prefix/suffix pair according to a predicate.
Note: c span p is equivalent to (but possibly more efficient than) (c takeWhile p, c dropWhile p), provided the evaluation of the predicate p does not cause any side-effects.
a pair consisting of the longest prefix of this sequence whose elements all satisfy p, and the rest of this sequence.
Split this string around the separator character
If this string is the empty string, returns an array of strings that contains a single empty string.
If this string is not the empty string, returns an array containing the substrings terminated by the start of the string, the end of the string or the separator character, excluding empty trailing substrings
If the separator character is a surrogate character, only split on matching surrogate characters if they are not part of a surrogate pair
The behaviour follows, and is implemented in terms of String.split(re: String)
the character used as a delimiter
"a.b".split('.') //returns Array("a", "b")
//splitting the empty string always returns the array with a single
//empty string
"".split('.') //returns Array("")
//only trailing empty substrings are removed
"a.".split('.') //returns Array("a")
".a.".split('.') //returns Array("", "a")
"..a..".split('.') //returns Array("", "", "a")
//all parts are empty and trailing
".".split('.') //returns Array()
"..".split('.') //returns Array()
//surrogate pairs
val high = 0xD852.toChar
val low = 0xDF62.toChar
val highstring = high.toString
val lowstring = low.toString
//well-formed surrogate pairs are not split
val highlow = highstring + lowstring
highlow.split(high) //returns Array(highlow)
//bare surrogate characters are split
val bare = "_" + highstring + "_"
bare.split(high) //returns Array("_", "_")
Splits this sequence into two at a given position. Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).
the position at which to split.
a pair of sequences consisting of the first n elements of this sequence, and the other elements.
Tests whether this sequence contains the given sequence at a given index.
Note: If the both the receiver object this and the argument that are infinite sequences this method may not terminate.
the sequence to test
the index where the sequence is searched.
true if the sequence that is contained in this sequence at index offset, otherwise false.
Tests whether this general sequence starts with the given sequence.
the sequence to test
true if this collection has that as a prefix, false otherwise.
Defines the prefix of this object's toString representation.
a string representation which starts the result of toString applied to this traversable collection. By default the string prefix is the simple name of the collection class traversable collection.
Strip trailing line end character from this string if it has one.
A line end character is one of
LF - line feed (0x0A hex)
FF - form feed (0x0C hex) If a line feed character LF is preceded by a carriage return CR (0x0D hex), the CR character is also stripped (Windows convention).
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed by | from the line.
For every line in this string:
Strip a leading prefix consisting of blanks or control characters followed by marginChar from the line.
Returns this string with the given prefix stripped. If this string does not start with prefix, it is returned unchanged.
Returns this string with the given suffix stripped. If this string does not end with suffix, it is returned unchanged.
For implementing CharSequence.
Returns a new String made up of a subsequence of this sequence, beginning at the start index (inclusive) and extending to the end index (exclusive).
target.substring(start, end) is equivalent to target.slice(start, end).mkString
The beginning index, inclusive.
The ending index, exclusive.
The new String.
StringIndexOutOfBoundsException If either index is out of bounds, or if start > end.
Returns a new String made up of a subsequence of this sequence, beginning at the given index and extending to the end of the sequence.
target.substring(start) is equivalent to target.drop(start)
The starting index, inclusive.
The new String.
IndexOutOfBoundsException if the index is out of bounds.
Sums up the elements of this collection.
the sum of all elements in this string builder of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the string builder and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.
Selects all elements except the first.
a sequence consisting of all elements of this sequence except the first one.
java.lang.UnsupportedOperationException if the sequence is empty.
Iterates over the tails of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of tail.
an iterator over all the tails of this traversable collection
List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)
Selects first n elements.
the number of elements to take from this sequence.
a sequence consisting only of the first n elements of this sequence, or else the whole sequence, if it has less than n elements. If n is negative, returns an empty sequence.
Selects last n elements.
the number of elements to take
a sequence consisting only of the last n elements of this sequence, or else the whole sequence, if it has less than n elements.
Takes longest prefix of elements that satisfy a predicate.
the longest prefix of this sequence whose elements all satisfy the predicate p.
The underlying collection seen as an instance of mutable.IndexedSeq
Converts this string builder into another by copying all elements.
The collection type to build.
a new collection containing all elements of this string builder.
Converts this string builder to an array.
an array containing all elements of this string builder. An ClassTag must be available for the element type of this string builder.
java.lang.IllegalArgumentException If the string does not contain a parsable Boolean.
Uses the contents of this sequence to create a new mutable buffer.
a buffer containing all elements of this sequence.
Parse as a Byte (string must contain only decimal digits and optional leading -).
java.lang.NumberFormatException If the string does not contain a parsable Byte.
A conversion from collections of type Repr to mutable.IndexedSeq
A conversion from collections of type Repr to IndexedSeq
Parse as a Double (surrounding whitespace is removed with a trim).
java.lang.NullPointerException If the string is null.
java.lang.NumberFormatException If the string does not contain a parsable Double.
Parse as a Float (surrounding whitespace is removed with a trim).
java.lang.NullPointerException If the string is null.
java.lang.NumberFormatException If the string does not contain a parsable Float.
Converts this traversable or iterator to an indexed sequence.
Note: will not terminate for infinite-sized collections.
an indexed sequence containing all elements of this traversable or iterator.
Parse as an Int (string must contain only decimal digits and optional leading -).
java.lang.NumberFormatException If the string does not contain a parsable Int.
Returns this iterable collection as an iterable collection.
A new collection will not be built; lazy collections will stay lazy.
Note: will not terminate for infinite-sized collections.
an Iterable containing all elements of this iterable collection.
Returns an Iterator over the elements in this iterable collection. Produces the same result as iterator.
Note: will not terminate for infinite-sized collections.
an Iterator containing all elements of this iterable collection.
Converts this sequence to a list.
a list containing all elements of this sequence.
Parse as a Long (string must contain only decimal digits and optional leading -).
java.lang.NumberFormatException If the string does not contain a parsable Long.
Converts this string builder to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.
a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this string builder.
Converts this sequence to a sequence.
Note: will not terminate for infinite-sized collections.
A new collection will not be built; in particular, lazy sequences will stay lazy.
a sequence containing all elements of this sequence.
Converts this traversable or iterator to a set.
Note: will not terminate for infinite-sized collections.
a set containing all elements of this traversable or iterator.
Parse as a Short (string must contain only decimal digits and optional leading -).
java.lang.NumberFormatException If the string does not contain a parsable Short.
Converts this iterable collection to a stream.
a stream containing all elements of this iterable collection.
Returns a new String representing the data in this sequence.
the current contents of this sequence as a String
because toString is inherited from AnyRef and used for many purposes, it is better practice to call mkString to obtain a StringBuilder result.
Converts this traversable collection to an unspecified Traversable. Will return the same collection if this instance is already Traversable.
Note: will not terminate for infinite-sized collections.
a Traversable containing all elements of this traversable collection.
Converts this traversable or iterator to a Vector.
Note: will not terminate for infinite-sized collections.
a vector containing all elements of this traversable or iterator.
Applies a transformation function to all values contained in this sequence. The transformation function produces new values from existing elements.
the transformation to apply
the sequence itself.
Transposes this collection of traversable collections into a collection of collections.
The resulting collection's type will be guided by the static type of collection. For example:
val xs = List(
Set(1, 2, 3),
Set(4, 5, 6)).transpose
// xs == List(
// List(1, 4),
// List(2, 5),
// List(3, 6))
val ys = Vector(
List(1, 2, 3),
List(4, 5, 6)).transpose
// ys == Vector(
// Vector(1, 4),
// Vector(2, 5),
// Vector(3, 6))
the type of the elements of each traversable collection.
an implicit conversion which asserts that the element type of this collection is a Traversable.
a two-dimensional collection of collections which has as nth row the nth column of this collection.
(Changed in version 2.9.0) transpose throws an IllegalArgumentException if collections are not uniformly sized.
IllegalArgumentException if all collections in this collection are not of the same size.
Produces a new sequence which contains all elements of this string builder and also all elements of a given sequence. xs union ys is equivalent to xs ++ ys.
Another way to express this is that xs union ys computes the order-preserving multi-set union of xs and ys. union is hence a counter-part of diff and intersect which also work on multi-sets.
the sequence to add.
a new string builder which contains all elements of this string builder followed by all elements of that.
Converts this collection of pairs into two collections of the first and second half of each pair.
val xs = Traversable(
(1, "one"),
(2, "two"),
(3, "three")).unzip
// xs == (Traversable(1, 2, 3),
// Traversable(one, two, three))
the type of the first half of the element pairs
the type of the second half of the element pairs
an implicit conversion which asserts that the element type of this collection is a pair.
a pair of collections, containing the first, respectively second half of each element pair of this collection.
Converts this collection of triples into three collections of the first, second, and third element of each triple.
val xs = Traversable(
(1, "one", '1'),
(2, "two", '2'),
(3, "three", '3')).unzip3
// xs == (Traversable(1, 2, 3),
// Traversable(one, two, three),
// Traversable(1, 2, 3))
the type of the first member of the element triples
the type of the second member of the element triples
the type of the third member of the element triples
an implicit conversion which asserts that the element type of this collection is a triple.
a triple of collections, containing the first, second, respectively third member of each element triple of this collection.
Equivalent to setCharAt.
A copy of this string builder with one single replaced element.
the position of the replacement
the replacing element
a copy of this string builder with the element at position index replaced by elem.
A sub-sequence view starting at index from and extending up to (but not including) index until.
The index of the first element of the slice
The index of the element following the slice
a non-strict view of a slice of this mutable indexed sequence, starting at index from and extending up to (but not including) index until.@note The difference between view and slice is that view produces a view of the current sequence, whereas slice produces a new sequence.
view(from, to) is equivalent to view.slice(from, to)
Creates a view of this iterable @see Iterable.View
a non-strict view of this mutable indexed sequence.
Creates a non-strict filter of this traversable collection.
Note: the difference between c filter p and c withFilter p is that the former creates a new collection, whereas the latter only restricts the domain of subsequent map, flatMap, foreach, and withFilter operations.
Note: might return different results for different runs, unless the underlying collection type is ordered.
the predicate used to test elements.
an object of class WithFilter, which supports map, flatMap, foreach, and withFilter operations. All these operations apply to those elements of this traversable collection which satisfy the predicate p.
Returns a string builder formed from this string builder and another iterable collection by combining corresponding elements in pairs. If one of the two collections is longer than the other, its remaining elements are ignored.
the type of the second half of the returned pairs
The iterable providing the second half of each result pair
a new string builder containing pairs consisting of corresponding elements of this string builder and that. The length of the returned collection is the minimum of the lengths of this string builder and that.
Returns a string builder formed from this string builder and another iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements are used to extend the shorter collection to the length of the longer.
the type of the second half of the returned pairs
The iterable providing the second half of each result pair
the element to be used to fill up the result if this string builder is shorter than that.
the element to be used to fill up the result if that is shorter than this string builder.
a new string builder containing pairs consisting of corresponding elements of this string builder and that. The length of the returned collection is the maximum of the lengths of this string builder and that. If this string builder is shorter than that, thisElem values are used to pad the result. If that is shorter than this string builder, thatElem values are used to pad the result.
Zips this string builder with its indices.
A new string builder containing pairs consisting of all elements of this string builder paired with their index. Indices start at 0.
List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))
(stringBuilder: any2stringadd[StringBuilder]).+(other)
(stringBuilder: SeqCharSequence).charAt(index)
(stringBuilder: SeqCharSequence).chars()
(stringBuilder: SeqCharSequence).codePoints()
(stringBuilder: MonadOps[Char]).filter(p)
(stringBuilder: MonadOps[Char]).flatMap(f)
(stringBuilder: SeqCharSequence).length()
(stringBuilder: MonadOps[Char]).map(f)
(stringBuilder: SeqCharSequence).subSequence(start, end)
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
(stringBuilder: SeqCharSequence).toString()
(stringBuilder: MonadOps[Char]).withFilter(p)
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.12.9/scala/collection/mutable/StringBuilder.html
A builder for mutable sequence of characters. This class provides an API mostly compatible with
java.lang.StringBuilder, except where there are conflicts with the Scala collections API (such as thereversemethod.)2.7