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31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
/*
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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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* Create an object composed of keys generated from the results of running each element of collection through iteratee.
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* The corresponding value of each key is the last element responsible for generating the key.
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* The iteratee is invoked with one argument: (value).
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* @template T
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* @param collection {T[]}
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* @param key {(item: T) => string | number}
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* @returns {Record<string, T>}
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*/
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export function keyBy(collection, key) {
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return collection.reduce((accumulator, item) => {
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accumulator[key(item)] = item;
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return accumulator;
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}, /** @type {Record<string, T>} */ ({}));
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}
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