Svyatoslav Kuzmich
22 lines
722 B
Kotlin
22 lines
722 B
Kotlin
/*
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* Copyright 2010-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
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* that can be found in the license/LICENSE.txt file.
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*/
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package kotlin
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/**
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* Returns `true` if this char sequence is empty (contains no characters).
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*/
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@kotlin.internal.InlineOnly
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public inline fun CharSequence.isEmpty(): Boolean = length == 0
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/**
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* Accumulates value starting with [initial] value and applying [operation] from left to right to current accumulator value and each element.
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*/
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public inline fun <T, R> Array<out T>.fold(initial: R, operation: (acc: R, T) -> R): R {
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var accumulator = initial
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for (element in this) accumulator = operation(accumulator, element)
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return accumulator
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}
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