For whatever reason I'm getting TypeError: Object #<Num> has no method 'getNumber' when creating numberOne as an instance of Num
function Num(n) {
var number = n;
var getNumber = function() {
return number;
};
}
var numberOne = new Num(5);
console.log(numberOne.getNumber());
You're declaring getNumber as a local variable inside the function. Those do not become properties of constructed objects.
Use this:
this.getNumber = function() { ...
In the constructor, this refers to the newly-created object to be initialized.
You can also use the prototype mechanism to provide object properties.
You are creating a local variable called getNumber without attaching it to the object. Either give it to the object, or put it on the prototype:
this.getNumber = function() {
or
function Num(n) {
this.number = n;
}
Num.prototype.getNumber = function() {
return this.number;
}
If you are creating lots of objects, you probably want to put getNumber on the prototype so it doesn't get added to the object every single time one gets created.
