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

inline fun <C : Appendable> CharSequence.filterIndexedTo(
    destination: C, 
    predicate: (index: Int, Char) -> Boolean
): C

Appends all characters matching the given predicate to the given destination.

Parameters

predicate - function that takes the index of a character and the character itself and returns the result of predicate evaluation on the character.