Nodejs Array Transpose transpose()

Method Source Code

/*!/* ww  w .j a  va  2  s  .co m*/
 *  Prototype and jQuery plugin to transpose Array.
 *
 * @author Shamasis Bhattacharya
 * @link http://www.shamasis.net/
 * @email mail@shamasis.net
 *
 * @version 1.0.0.0
 * @publish 24-Feb-2010 00:00 +0530 IST
 *
 */
 
/**
 * Transposes a given array.
 * @id Array.prototype.transpose
 * @author Shamasis Bhattacharya
 
 * @type Array
 * @return The Transposed Array
 * @compat=ALL
 */
Array.prototype.transpose = function() {

   // Calculate the width and height of the Array
   var a = this,
       w = a.length ? a.length : 0,
      h = a[0] instanceof Array ? a[0].length : 0;

   // In case it is a zero matrix, no transpose routine is needed.
   if(h === 0 || w === 0) { return []; }

   /**
    * @var {Number} i Counter
    * @var {Number} j Counter
    * @var {Array} t Is the array where transposed data is stored.
    */
   var i, j, t = [];

   // Loop through every item in the outer array (height)
   for(i=0; i<h; i++) {

      // Insert a new row (array)
      t[i] = [];

      // Loop through every item per item in outer array (width)
      for(j=0; j<w; j++) {

         // Save transposed data.
         t[i][j] = a[j][i];
      }
   }

   return t;
};

Related

1. 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++) {
   ...
   

2. transpose()

   "use strict";
   Array.prototype.transpose = function (){
     const columns = [];
     for( let i = 0; i < this[0].length; i++){
       columns.push([]);
     for( let i = 0; i < this.length; i++){
       for(let j = 0; j < this.length; j++){
         columns[j].push(this[i][j]);
   ...
   

3. 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++) {
   ...
   

4. transpose()

   Array.prototype.transpose = function (){
     const cols = this[0].length;
     const rows = this.length;
     let result = Array(rows).fill().map(() => Array());
     this.forEach(function (row){
       row.forEach(function (num, index){
         result[index].push(num);
       });
     });
   ...
   

5. transpose()

   Array.prototype.transpose = function() {
     var result = [];
     if (!(this instanceof Array))
       return result;
     if (this.length == 0)
       return result;
   ...