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

inline fun <R> CharSequence.foldRightIndexed(
    initial: R, 
    operation: (index: Int, Char, acc: R) -> R
): R

Accumulates value starting with initial value and applying operation from right to left to each character with its index in the original char sequence and current accumulator value.

Returns the specified initial value if the char sequence is empty.

Parameters

operation - function that takes the index of a character, the character itself and current accumulator value, and calculates the next accumulator value.