如何从JavaScript中的私有函数访问公共函数

Question

Here is an example can anybody tell me how to do this

var calculation = function(){
    this.Add = function(){
    }
    this.Subtract(){
        var add = function(){
        //want to access Add function here
        }
    }
}

Answer 1

You can simply use a variable to refer to this and you can use that variable latter.

 var calculation = function() { var _this = this; this.Add = function() { alert('In Add function'); } this.Subtract = function() { var add = function() { //want to access Add function here _this.Add(); } add(); } }; var cal = new calculation() cal.Subtract() 

Answer 2

Try this:

vvar calculation = function(){
    this.Add = function(){
        alert("test");
    }
    this.Subtract = function(){
        this.Add();
    }.bind(this)
}

var sum = new calculation();
sum.Subtract();

http://jsfiddle.net/f6rp9mpL/