forked from GitHub-Mirror/riotX-android
38 lines
1.2 KiB
Kotlin
38 lines
1.2 KiB
Kotlin
/*
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*
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* * Copyright 2019 New Vector Ltd
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* *
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* * Licensed under the Apache License, Version 2.0 (the "License");
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* * you may not use this file except in compliance with the License.
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* * You may obtain a copy of the License at
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* *
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* * http://www.apache.org/licenses/LICENSE-2.0
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* *
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* * Unless required by applicable law or agreed to in writing, software
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* * distributed under the License is distributed on an "AS IS" BASIS,
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* * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* * See the License for the specific language governing permissions and
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* * limitations under the License.
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*
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*/
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package im.vector.riotredesign.core.extensions
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/**
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* Returns the last element yielding the smallest value of the given function or `null` if there are no elements.
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*/
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public inline fun <T, R : Comparable<R>> Iterable<T>.lastMinBy(selector: (T) -> R): T? {
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val iterator = iterator()
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if (!iterator.hasNext()) return null
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var minElem = iterator.next()
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var minValue = selector(minElem)
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while (iterator.hasNext()) {
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val e = iterator.next()
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val v = selector(e)
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if (minValue >= v) {
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minElem = e
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minValue = v
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}
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}
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return minElem
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} |