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maxOfWithOrNull

Platform and version requirements: JVM (1.4), JS (1.4), Native (1.4)
inline fun <R> CharSequence.maxOfWithOrNull(
    comparator: Comparator<in R>, 
    selector: (Char) -> R
): R?

Returns the largest value according to the provided comparator among all values produced by selector function applied to each character in the char sequence or null if there are no characters.

© 2010–2020 JetBrains s.r.o. and Kotlin Programming Language contributors
Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.text/max-of-with-or-null.html