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Module

std/collections/associate_with.ts

The Deno Standard Library
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// Copyright 2018-2024 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/assert/assert_equals.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: Iterable<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;}