Javascript accessing inner function from outside

Question

I have the following json object

{
 ....
 ....
 data: function() {
    var x = 10;
    function isBig() {
        return x>6;
    }
    return x;
 }
}

I want the isBig to be a function inside data.

When I call data.isBig I am getting undefined and data.isBig() gives me an error saying isBig is not a function.

Answer 1

First of all, that is not JSON. It is an object. The way your object is structured currently, isBig is only accessible from inside data . If you want to access it outside data , the simplest way is to make it a property of the outer object:

{
    data: function()
    {
        var x = 10;
        return x;
    }
    isBig: function(x)
    {
        return x > 6;
    }
}

If you don't want to do that, then an alternative would be this:

{
    data: function()
    {
        var x = 10;
        this.isBig = function(x)
        {
            return x > 6;
        }
        return x;
    }
}

Calling data() works normally (returns 10), whereas calling new data() returns an object with a property isBig which corresponds to the function. This allows you to do this:

new myObj.data().isBig()

Answer 2

 obj = { data: function(){ var x = 10; return this.isBig(x); }, isBig: function(x){ return x > 6; } }; 

And if you want to reproduce the function but useally your better off with an contructor add that point.

 f = { isSmall: function(){}, isBig: function(x){ return x > 6; } }; obj = { data: function(){ var x = 10; return this.isBig(x); }, isBig: f.isBig }; obj.data(); obj.isBig(2); f.isBig(2);