18 lines
603 B
TypeScript
18 lines
603 B
TypeScript
// Copyright 2019-2021 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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export function makeLookup<T>(
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items: ReadonlyArray<T>,
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key: keyof T
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): Record<string, T> {
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return (items || []).reduce((lookup, item) => {
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if (item !== undefined && item[key] !== undefined) {
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// The force cast is necessary if we want the keyof T above, and the flexibility
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// to pass anything in. And of course we're modifying a parameter!
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// eslint-disable-next-line no-param-reassign
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lookup[String(item[key])] = item;
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}
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return lookup;
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}, {} as Record<string, T>);
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}
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