mirror of
https://gitlab.com/openstapps/openstapps.git
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42 lines
1.3 KiB
TypeScript
42 lines
1.3 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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* Pick a set of properties from an object
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*/
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export function pick<T extends object, U extends keyof T>(object: T, keys: U[]): Pick<T, U> {
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return keys.reduce((accumulator, key) => {
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if (object.hasOwnProperty(key)) {
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accumulator[key] = object[key];
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}
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return accumulator;
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}, {} as Pick<T, U>);
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}
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/**
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* Pick a set of properties from an object using a predicate function
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*/
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export function pickBy<T extends object, U extends keyof T>(
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object: T,
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predicate: (value: T[U], key: U) => boolean,
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): Pick<T, U> {
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return (Object.keys(object) as U[]).reduce((accumulator, key) => {
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if (predicate(object[key], key)) {
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accumulator[key] = object[key];
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}
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return accumulator;
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}, {} as Pick<T, U>);
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}
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