I have the following object:
var obj1 = {};
obj1.obj2 = {
prop1: 0
};
and the following function:
function func1() {
var p = obj1.obj2.prop1;
p += 2;
return p;
};
When updating 'p' it has not updated 'obj1.obj2.prop1'. Instead of 'p' pointing to the original object is it now it's own object by itself? If so how can I make 'p' a pointer?
When you do var p = obj1.obj2.prop1;, you are setting p to the value of prop1. So, when you update p, you're just updating the value set in p.
What you can do is set p to obj1.obj2. Then you can update p.prop1 and it should update obj1.
function func1() {
var p = obj1.obj2;
p.prop1 += 2;
return p.prop1;
}
Javascript doesn't have pass-by-reference so you would have to do the following:
var obj1 = {};
obj1.obj2 = {
prop1: 0
};
function func1(obj) {
obj.obj2.prop1 += 2;
return obj.obj2.prop1;
};
func1(obj1);
p += 2 is just assigning an other number to p, this isn't modifying the object pointed to by p.
Do this instead:
obj1.obj2.prop1 += 2;
or
var obj = obj1.obj2;
obj.prop1 += 2;
