JavaScript 2D array rotations

rot.js

var arr1 = [
  ['1', '2', '3', '4'],
  ['5', '6', '7', '8'],
  ['9', 'a', 'b', 'c'],
  ['d', 'e', 'f', 'g'],
];

function rotCCW(arr) {
  var n = arr.length;
  var ret = new Array(n);
  
  // Give the return value the right dimensions.
  for(var i = 0; i < n; i++) {
    ret[i] = new Array(n);
  }
   
  var x = 0, y = 0;
  
  for(x = 0; x < n; x++) {
    for(y = 0; y < n; y++) {
      ret[y][x] = arr[x][n - y - 1];
    }
  }
  
  return ret;
}

function rotCW(arr) {
  var n = arr.length;
  var ret = new Array(n);
  
  // Give the return value the right dimensions.
  for(var i = 0; i < n; i++) {
    ret[i] = new Array(n);
  }
   
  var x = 0, y = 0;
  
  for(x = 0; x < n; x++) {
    for(y = 0; y < n; y++) {
      ret[y][x] = arr[n - x - 1][y];
    }
  }
  
  return ret;
}

console.log(rotCW(arr1));
console.log(rotCCW(arr1));