Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

operator fun CharSequence.contains(
    other: CharSequence, 
    ignoreCase: Boolean = false
): Boolean

Returns true if this char sequence contains the specified other sequence of characters as a substring.

Parameters

ignoreCase - true to ignore character case when comparing strings. By default false.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

operator fun CharSequence.contains(
    char: Char, 
    ignoreCase: Boolean = false
): Boolean

Returns true if this char sequence contains the specified character char.

Parameters

ignoreCase - true to ignore character case when comparing characters. By default false.

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)

operator fun CharSequence.contains(regex: Regex): Boolean

Returns true if this char sequence contains at least one match of the specified regular expression regex.