var that = null;function.prototype.bind = function(obj,arg){
if (that == null){
that = this
} return function(){
return that.call(obj,arg);
}
};function foo() {
return this.bar;
}
foo = foo.bind({bar:1});
foo = foo.bind({bar:2});var result = foo();
console.log(result);//2
以上就是重写bind方法的详细内容。
