kotlin.sequences.indexOfFirst
indexOfFirst
inline fun <T> Sequence<T>.indexOfFirst( predicate: (T) -> Boolean ): Int
Returns index of the first element matching the given predicate, or -1 if the sequence does not contain such element.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.sequences/index-of-first.html
