GeezerVison

The World Wide Web, restored to 800 pixels of glory.

GeezerVison is showing leetcodejavascript.com — #2022 - Convert 1D Array Into 2D Array - LeetCode JavaScript Solutions

Back to all solutions

#2022 - Convert 1D Array Into 2D Array

Easy • View on LeetCode • View on GitHub

Array Matrix Simulation

Problem Description

You are given a 0-indexed 1-dimensional (1D) integer array original, and two integers, m and n. You are tasked with creating a 2-dimensional (2D) array with m rows and n columns using all the elements from original.

The elements from indices 0 to n - 1 (inclusive) of original should form the first row of the constructed 2D array, the elements from indices n to 2 * n - 1 (inclusive) should form the second row of the constructed 2D array, and so on.

Return an m x n 2D array constructed according to the above procedure, or an empty 2D array if it is impossible.

Solution

/**
 * @param {number[]} original
 * @param {number} m
 * @param {number} n
 * @return {number[][]}
 */
var construct2DArray = function(original, m, n) {
  if (original.length !== m * n) return [];

  const result = [];
  for (let i = 0; i < m; i++) {
    result.push(original.slice(i * n, (i + 1) * n));
  }

  return result;
};

You are visitor 01402520 — GeezerVison does not store the pages you look up.
Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.