Question

I’d like to know if this is possible.

number = function(n){

  var num = n;

  this.add = function(x){
    return num + x;
  }

  return num;

}

alert(number(7)); //returns 7

seven = new number(7);
alert(seven.add(3)); // returns 10
alert(seven); // want this to return 7, but will return [object Object]

I don’t need number(7) to return 7, but it would be nice.

Answer 1

Give it a “toString”:

number = function(n){

  var num = n;

  this.add = function(x){
    return num + x;
  }

  this.toString = function() {
    return num + "";
  };

  return num;

}

You can also give it a “valueOf” function:

  this.valueOf = function() { return num; }

That will let you do:

alert(seven + 7); // 14