Curious case of JavaScript function arguments

argumentsAsArray.js

/**
 * Running the array reverse function on arguments object
 */ 
function reverseArgs(){
  return Array.prototype.reverse.call(arguments);
}

reverseArgs(12,34,55);
// OUTPUT
// [55, 34, 12]

/**
 * Running the array join function on arguments object
 */
function argsJoin(){
  return [].join.apply(arguments,["~"]);
}

argsJoin(12,33,44);
// OUTPUT
// "12~33~44"

argumentsInstanceOf.js

/**
 * arguments object just looks like an index Array, it's not an Array object 
 */
function argsExp(){
  return arguments instanceof Array;
}

argsExp();
//OUTPUT
// false

printArguments.js

/**
 * arguments object have an array like notation 
 */
function argsExp(){
  return arguments;
}

argsExp("one", "two", "three");
// OUTPUT
// ["one", "two", "three"]