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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.// This module is browser compatible.
/** * Builds two separate arrays from the given array of 2-tuples, with the first * returned array holding all first tuple elements and the second one holding * all the second elements. * * ```ts * import { unzip } from "https://deno.land/std@$STD_VERSION/collections/unzip.ts"; * import { assertEquals } from "https://deno.land/std@$STD_VERSION/assert/assert_equals.ts"; * * const parents = [ *   ["Maria", "Jeff"], *   ["Anna", "Kim"], *   ["John", "Leroy"], * ] as [string, string][]; * * const [moms, dads] = unzip(parents); * * assertEquals(moms, ["Maria", "Anna", "John"]); * assertEquals(dads, ["Jeff", "Kim", "Leroy"]); * ``` */export function unzip<T, U>(pairs: readonly [T, U][]): [T[], U[]] {  const { length } = pairs;  const ret: [T[], U[]] = [    Array<T>(length),    Array<U>(length),  ];
  pairs.forEach(([first, second], index) => {    ret[0][index] = first;    ret[1][index] = second;  });
  return ret;}