Question

同这一例子一样:

var teste = {name: marcos };
$(teste).each(function(){

    var name = this.name; // i don t want to do that.

    // i want to have access to  this  inside this function (sayName)
    var sayName = function(){
        alert(name); // there is something like "super" in java? or similar way to do?
    }
    sayName();

});

如何做到这一点?

Answer 1

this is never implicit in JavaScript (as it is in Java). This means that if you do not invoke a function as a method on an object, this will not be bound to something reasonable (it will be bound to the window object in the browser). If you want to have a this inside the function, that function should be used as a method, that is:

var teste = {name: marcos };
$(teste).each(function(){

    this.sayName = function(){
        alert(this.name); 
    }
    this.sayName();

});

Then sayName is a method and is invoked in this

Answer 2

我看到因特网上的许多例子(包括基于质量的事例):

var that = this;
var sayName = function() {
   alert(that.name);
}

Answer 3

这里还有另一种方式:

var teste = {name: marcos };
$(teste).each(function(){

var that = this;

var sayName = function(){
    alert(that.name);
}
sayName();

});

That is your super :-) Seriously, there is no "super" because it s not extension.

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