unzip

arrays

This method is like zip except that it accepts an array of grouped elements and creates an array regrouping the elements to their pre-zip configuration.

Try in Playground

Installation

Import

import { unzip } from '@tulx/utils';

Source Code

Implementation

/**
 * This method is like zip except that it accepts an array of grouped elements and creates an array
 * regrouping the elements to their pre-zip configuration.
 *
 * @param array - The array of grouped elements to process.
 * @returns The new array of regrouped elements.
 *
 * @example
 * ```ts
 * const zipped = zip(['a', 'b'], [1, 2], [true, false]);
 * unzip(zipped); // [['a', 'b'], [1, 2], [true, false]]
 * ```
 */
export function unzip<T>(array: readonly T[][]): T[][] {
  if (array.length === 0) {
    return [];
  }

  const maxLength = Math.max(...array.map((arr) => arr.length));
  const result: T[][] = [];

  for (let i = 0; i < maxLength; i++) {
    result[i] = [];
    for (const arr of array) {
      result[i].push(arr[i]);
    }
  }

  return result;
}

Example

import { unzip } from '@tulx/utils';

const zipped = zip(['a', 'b'], [1, 2], [true, false]);
unzip(zipped); // [['a', 'b'], [1, 2], [true, false]]

Related Functions

chunk

Creates an array of elements split into groups the length of size. If array can't be split evenly, the final chunk will be the remaining elements.

compact

Creates an array with all falsy values removed. The values false, null, 0, "", undefined, and NaN are falsy.

concat

Creates a new array concatenating array with any additional arrays and/or values.

difference

Creates an array of array values not included in the other given arrays. The order and references of result values are determined by the first array.

differenceBy

This method is like difference except that it accepts iteratee which is invoked for each element of array and values to generate the criterion by which they're compared.

differenceWith

This method is like difference except that it accepts comparator which is invoked to compare elements of array to values.