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Module

std/collections/zip.ts

Deno standard library
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Builds 2-tuples of elements from the given array with matching indices, stopping when the smaller array's end is reached * * Example: * * ```ts * import { zip } from "https://deno.land/std@$STD_VERSION/collections/mod.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/testing/asserts.ts"; * * const numbers = [ 1, 2, 3, 4 ] * const letters = [ 'a', 'b', 'c', 'd' ] * const pairs = zip(numbers, letters) * * assertEquals(pairs, [ * [ 1, 'a' ], * [ 2, 'b' ], * [ 3, 'c' ], * [ 4, 'd' ], * ]) * ``` */export function zip<T, U>( array: readonly T[], withArray: readonly U[],): [T, U][] { const returnLength = Math.min(array.length, withArray.length);
const ret = new Array<[T, U]>(returnLength);
for (let i = 0; i < returnLength; i += 1) { ret[i] = [array[i], withArray[i]]; }
return ret;}