Question

I’m used to Java so when i try to so something like this:

function subSection(pattern){
    this.total = 0;
    this.pattern = pattern;
    this.distance=0;
}

function enhancer(pattern){
    __proto__:subSection;
    this.pattern = pattern;
}

function silencer(pattern){
    __proto__:subSection;
    this.pattern = pattern;
}

var a = new enhancer("aaa");
document.write(a.distance)

I get “undefined”. I thought i have inherited the total and distance data members

Answer 1

function subSection(pattern){
    this.total = 0;
    this.pattern = pattern;
    this.distance=100;
}

function enhancer(pattern){
    this.__proto__=new subSection(pattern);
}

function silencer(pattern){
    this.__proto__=new subSection(pattern);
}

var a = new enhancer("aaa");
document.write(a.distance)​;

But it’s only a Mozilla proprietary property as RobG said.

DEMO.

Update:

function subSection(pattern){
    this.total = 0;
    this.pattern = pattern;
    this.distance=100;
}

function enhancer(pattern){
    function F(){};
    F.prototype = new subSection(pattern); // inherited subSection
    return new F();    
}

function silencer(pattern){
    function F(){};
    F.prototype = new subSection(pattern); // inherited subSection
    return new F();
}

var a = new enhancer("aaa");
document.write(a.distance)​;

DEMO.

Useful Links: here and here.