请参阅文章：在Javascript和jQuery中转置数组
function transpose(a) { // Calculate the width and height of the Array var w = a.length || 0; var h = a[0] instanceof Array ? a[0].length : 0; // In case it is a zero matrix, no transpose routine needed. if(h === 0 || w === 0) { return []; } 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;}console.log(transpose([[1,2,3],[4,5,6],[7,8,9]]));
