55 lines
1.7 KiB
Kotlin
55 lines
1.7 KiB
Kotlin
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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@file:JvmName("ListUtils")
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package com.keylesspalace.tusky.util
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import java.util.ArrayList
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import java.util.LinkedHashSet
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/**
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* @return true if list is null or else return list.isEmpty()
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*/
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fun isEmpty(list: List<*>?): Boolean {
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return list == null || list.isEmpty()
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}
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/**
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* @return a new ArrayList containing the elements without duplicates in the same order
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*/
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fun <T> removeDuplicates(list: List<T>): ArrayList<T> {
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val set = LinkedHashSet(list)
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return ArrayList(set)
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}
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inline fun <T> List<T>.withoutFirstWhich(predicate: (T) -> Boolean): List<T> {
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val newList = toMutableList()
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val index = newList.indexOfFirst(predicate)
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if (index != -1) {
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newList.removeAt(index)
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}
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return newList
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}
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inline fun <T> List<T>.replacedFirstWhich(replacement: T, predicate: (T) -> Boolean): List<T> {
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val newList = toMutableList()
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val index = newList.indexOfFirst(predicate)
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if (index != -1) {
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newList[index] = replacement
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}
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return newList
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}
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