Randomly slice an array and rearrange elements

Array.prototype.randomizeData.js

/*
 * Randomly slice an array and rearrange elements
 *
 * Useful for fake ajax data
 *
 * jQuery Example:
 *  $.get("/fake-ajax.json", function (data) {
 *    renderSomething(data.randomizeData());
 *  });
 *
 */
Array.prototype.randomizeData = function () {
  function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1) + min);
  }
  
  var arraySize = this.length;
  var startSliceAt = getRandomInt(0, arraySize);
  var endSliceAt = getRandomInt(startSliceAt, arraySize);

  return this.slice(startSliceAt, endSliceAt).sort(function() {return 0.5 - Math.random()});
}