deno.land / std@0.166.0 / collections / associate_with.ts

associate_with.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Builds a new Record using the given array as keys and choosing a value for each * key using the given selector. If any of two pairs would have the same value * the latest on will be used (overriding the ones before it). * * Example: * * ```ts * import { associateWith } from "https://deno.land/std@$STD_VERSION/collections/associate_with.ts" * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts"; * * const names = [ 'Kim', 'Lara', 'Jonathan' ] * const namesToLength = associateWith(names, it => it.length) * * assertEquals(namesToLength, { * 'Kim': 3, * 'Lara': 4, * 'Jonathan': 8, * }) * ``` */export function associateWith<T>( array: readonly string[], selector: (key: string) => T,): Record<string, T> { const ret: Record<string, T> = {};
for (const element of array) { const selectedValue = selector(element);
ret[element] = selectedValue; }
return ret;}
std
Deno standard library
GitHub Repositorydenoland/deno_std
GitHub Stars
2458

Version Info

Tagged at
2 months ago