解释约翰·雷西格的忍者密码

Function.prototype.bind = function(){
     var fn = this, args = Array.prototype.slice.call(arguments),
      object = args.shift();
      return function(){
              return fn.apply(object,
                   args.concat(Array.prototype.slice.call(arguments)));
      };
};


var myObject = {};
function myFunction(){
    return this == myObject;
}
assert( !myFunction(), "Context is not set yet" );
var aFunction = myFunction.bind(myObject)
assert( aFunction(), "Context is set properly" );

下面对Jeffery代码的微小修改帮助我理解内部匿名函数中使用的参数。我刚换了下面三行

var introduce = function(greeting) { alert(greeting + ", my name is " + this.name + " ,home no is " + arguments[1]); }

hiBob(" 456"); // alerts "Hi, my name is Bob"
yoJoe(" 876");  

谢谢大家