mirror of
https://gitlab.com/openstapps/openstapps.git
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29 lines
1.0 KiB
TypeScript
29 lines
1.0 KiB
TypeScript
/*
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* Copyright (C) 2022 StApps
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation, version 3.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/**
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* Partitions a list into two lists. One with the elements that satisfy a predicate,
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* and one with the elements that don't satisfy the predicate.
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*/
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export function partition<T>(array: T[], transform: (item: T) => boolean): [T[], T[]] {
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return array.reduce<[T[], T[]]>(
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(accumulator, item) => {
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accumulator[transform(item) ? 0 : 1].push(item);
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return accumulator;
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},
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[[], []],
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);
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}
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