How to use a function converted from string after new Date()?

Question

I want to output new Date().getDate()

But getDate() is inside a string

fn = "getDate()"
d = new Date();


// How do I make it work?
console.log(d.fn);

The problem is that I can't use it as it is now.

Many thanks!

score 2 · Accepted Answer · answered Oct 23 '14 at 13:16

2

You can put the method name getDate without () into a string and use bracket notation:

fn = "getDate"
d = new Date();

console.log(d[fn]());

answered Oct 23 '14 at 13:16

tymeJV

Thanks @tymeJV. This one I like it. I will aprove your answer, but I will not be able to upvote your answer, as I don't have reputation yet. Thanks! – Tudor Oct 23 '14 at 13:21
Do you know how do we call this brackets [] _technique_? – Tudor Oct 23 '14 at 13:29
@Tudor -- It's simply called bracket notation – tymeJV Oct 23 '14 at 13:30
@Tudor: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Property_Accessors – Felix Kling Oct 23 '14 at 13:36
Thanks again. I found the detailed explantation here http://stackoverflow.com/questions/4968406/javascript-property-access-dot-notation-vs-brackets – Tudor Oct 23 '14 at 13:36
@tymeJV why do I need to get rid of **()** from **getDate**? – Tudor Oct 23 '14 at 13:39
@Tudor -- Because you can't use that within the string to trigger the function call. – tymeJV Oct 23 '14 at 13:40
@Tudor: Simply because the property is called `getDate`, not `getDate()`. – Felix Kling Oct 23 '14 at 15:00

score 1 · Answer 2 · answered Oct 23 '14 at 13:18

1

answered Oct 23 '14 at 13:18

Pavel Birukov

2 Answers2