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wysihtml5.lang.array = function(arr) {
  return {
    /**
     * Check whether a given object exists in an array
     *
     * @example
     *    wysihtml5.lang.array([1, 2]).contains(1);
     *    // => true
     */
    contains: function(needle) {
      if (arr.indexOf) {
        return arr.indexOf(needle) !== -1;
      } else {
        for (var i=0, length=arr.length; i<length; i++) {
          if (arr[i] === needle) { return true; }
        }
        return false;
      }
    },
    
    /**
     * Substract one array from another
     *
     * @example
     *    wysihtml5.lang.array([1, 2, 3, 4]).without([3, 4]);
     *    // => [1, 2]
     */
    without: function(arrayToSubstract) {
      arrayToSubstract = wysihtml5.lang.array(arrayToSubstract);
      var newArr  = [],
          i       = 0,
          length  = arr.length;
      for (; i<length; i++) {
        if (!arrayToSubstract.contains(arr[i])) {
          newArr.push(arr[i]);
        }
      }
      return newArr;
    },
    
    /**
     * Return a clean native array
     * 
     * Following will convert a Live NodeList to a proper Array
     * @example
     *    var childNodes = wysihtml5.lang.array(document.body.childNodes).get();
     */
    get: function() {
      var i        = 0,
          length   = arr.length,
          newArray = [];
      for (; i<length; i++) {
        newArray.push(arr[i]);
      }
      return newArray;
    }
  };
};

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