99.js

gistfile1.js

var myarray;

(function() {
  var astr = "[object Array]",
      toString = Object.prototype.toString;

  function isArray(a){
    return toString.call(a) === astr;
  }

  function indexOf(haystack, needle) {
    var i = 0,
        max = haystack.length;

    for (; i < max; i += 1) {
      if (haystack[i] === needle) {
        return i;
      }
    }
    return -1;
  }

  myarray = {
    isArray: isArray,
    indexOf: indexOf,
    inArray: indexOf
  };
  
}());