Javascript assign object method

Question

Why is assigning method to object property not supported on that way:

neki1: pisaniMethod()

It seems like when assigning method to object property is not supported with brackets?

function pisaniMethod(){return 'testing';}

var person = {        
    neki: pisaniMethod, //this works
    neki1: pisaniMethod()  //this is not working
};

I guess I was wrong with this:

person.neki1();

I've tried to make a function call on neki1.

`pisaniMethod()` is a function call.. `neki1` will have `testing`.. — Suraj Rao, Apr 15 '17 at 07:39
What does *work* mean for you? It does assign result of function call to the `neki1`. So, that is wrong? — buræquete, Apr 15 '17 at 07:40
Putting `()` after the method name basically says: execute this method *now*! So, in your case value returned by the method will be assigned to `neki1`, while the link to execute the function will be attached to `neki`. — SimpleBeat, Apr 15 '17 at 07:42
Possible duplicate of [What is the difference between a function call and function reference?](http://stackoverflow.com/questions/15886272/what-is-the-difference-between-a-function-call-and-function-reference) — JJJ, Apr 15 '17 at 07:43
If result of call `pisaniMethod()` will be function you'll be able to call it. But than in `neki` you'll get function that will return function to call — Pavlo Zhukov, Apr 15 '17 at 07:50

Pavlo Zhukov · Accepted Answer · 2017-04-15T07:47:31.290

3

Because when your assign pisaniMethod you assign link to function. In this way pisaniMethod() you assign result of function call: "testing" in your case.

function pisaniMethod(){return 'testing';};

var person = {        
    neki: pisaniMethod, //this works
    neki1: pisaniMethod()  //this is not working
};

alert(person.neki);
alert(person.neki1);
alert(typeof person.neki);
alert(typeof person.neki1);

edited Apr 15 '17 at 07:47

answered Apr 15 '17 at 07:40

Pavlo Zhukov

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score 1 · Answer 2 · answered Apr 15 '17 at 07:42

function pisaniMethod(){return 'testing';};

var person = {        
    neki: pisaniMethod, //this works
    neki1: pisaniMethod()  //this is not working
};

In the first case you are assigning the method. In the second case you are assigning the result retuned by the function since pisaniMethod() is a function call, in your case it will be testing.

Javascript assign object method

2 Answers2