Hi, I was interested in suggesting a new standard library function in kotlin.collections and in writing it myself and making a pull request to contribute, Is this something that would be of interest? I found myself wanting this function but it not existing in the standard library, it would be

binarySearchIndexed

With a signature of perhaps

fun <T : Comparable<T>> List<T>.binarySearchIndexed(
    fromIndex: Int = 0,
    toIndex: Int = size,
    comparison: (T, Int) -> Int,
): Int

Not quite the same but you can

.withIndex().binarySearch { ... }

.