Nodejs Array Transpose transpose()

Method Source Code

Array.prototype.transpose = function () {
  const transposed = [];// ww w  .  j  a v a 2 s. c om
  const rows = this.length;
  const cols = this[0].length;
  for (let c = 0; c < cols; c++) {
    let row = [];
    for (let r = 0; r < rows; r++) {
      row.push(this[r][c]);
    }
    transposed.push(row);
  }
  return transposed;
};

const arr1 = [1, 2, 2, 4, 6, 6];
const arr2 = [1, 0, -1, 2, -2];
const mat = [[1,2,3], [4,5,6]];

Related

1. transpose()

   Array.prototype.transpose = function () {
     var transposed = [[],[],[]];
     for( var i = 0; i < this.length; i++) {
       for( var j = 0; j < this[i].length; j++) {
         var new_val = this[j][i]
         transposed[i][j] = new_val;
       };
     };
     return transposed;
   ...
   

2. transpose()

   Array.prototype.transpose = function () {
     var columns = [];
     for (var i = 0; i < this[0].length; i++) {
       columns.push([]);
     for (var i = 0; i < this.length; i++) {
       for (var j = 0; j < this[i].length; j++) {
         columns[j].push(this[i][j]);
     return columns;
   };
   

3. transpose()

   util = require('util');
   var identity = function(x) {
     return x;
   };
   var pair = function(a, b){
     return [a, b];
   };
   var isArray = function(a) {
     return a && typeof a === 'object' && a.constructor === Array;
   ...
   

4. transpose()

   Array.prototype.transpose = function() {
     var a = this,
       w = a.length ? a.length : 0,
       h = a[0] instanceof Array ? a[0].length : 0;
     if(h === 0 || w === 0) { return []; }
     var i, j, t = [];
     for(i=0; i<h; i++) {
       t[i] = [];
       for(j=0; j<w; j++) {
   ...
   

5. transpose()

   Array.prototype.transpose = function () {
     var transpose = [];
     for (var i = 0; i < this[0].length; i++) {
       var row = [];
       for (var j = 0; j < this.length; j++) {
         row.push(this[j][i]);
       transpose.push(row);
     return transpose;
   };
   

6. transpose()

   'use strict';
   Array.prototype.transpose = function() {
     if(this.length === 0) return [];
     if(this[0].length === 0) return [[]];
     let transposeArray = [];
     for(let i = 0, j = this[0].length; i < j; i++) {
       transposeArray[i] = [];
       for(let x = 0, y = this.length; x < y; x++) {
         transposeArray[i].push(this[x][i]);
   ...
   

7. transpose()

   Array.prototype.transpose = function() {
     var new_matrix = [];
     for (var i = 0; i < this.length; i++) {
       new_matrix.push([]);
     for (var i=0; i < this.length; i++) {
       for (var j=0; j < this.length; j++) {
         new_matrix[j][i] = this[i][j];
     return new_matrix;
   };
   

8. transpose()

   Array.prototype.transpose = function () {
     var transposed = [];
     for (var i = 0; i < this.length; i++) {
       transposed[i] = this[i].slice();
     for (var i = 0; i < this.length; i++) {
       for (var j = 0; j < this.length; j++) {
         transposed[j][i] = this[i][j];
       };
   ...
   

9. transpose()

   Array.prototype.transpose = function () {
     var result = []
     for (var row = 0; row < this.length; row++) {
       for (var col = 0; col < this[0].length; col++) {
         if (!result[col]) {
           result[col] = [this[row][col]]
         } else {
           result[col].push(this[row][col])
     return result;