array utils

array-utils.js

 /**
  * return randomized array
  */
 function randomized(arr) {
      var array = arr.slice(0);
      for (var i = array.length - 1; i > 0; i--) {
          var j = Math.floor(Math.random() * (i + 1));
          var temp = array[i];
          array[i] = array[j];
          array[j] = temp;
      }
      return array;
 }


 /**
  * check if value exists in array
  */
 function inArray(val, arr, returnIndex) {
      returnIndex = typeof returnIndex !== 'undefined' ? returnIndex : false;

      var len = arr.length;
     for(var i = 0; i < len; i++) {
         if(val == arr[i]) 
              return returnIndex ? i : true;
     }
      return false;
 }