Javascript add dynamic function to an object

Question

Is there any way to add a function to an object without knowing it's name in advance?

I do something like:

var $functionName = "sayHello"; 

object."$functionName" = function (args) {
     // Do stuff 
} 

/// Later

object.sayHello ("Henry");

Unrelated: Is it a PHP influence to name variables starting with $? Or jQuery? — emerson.marini
– emerson.marini, Commented Aug 21, 2014 at 4:46

cdhowie · Accepted Answer · 2014-08-21 04:33:28Z

3

Yes:

var functionName = "sayHello";

anObject[functionName] = function (args) {
    // ...
}

Note that a.b is syntactic sugar for a["b"] -- they mean exactly the same thing.

answered Aug 21, 2014 at 4:33

cdhowie

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Comments

Cjmarkham · Accepted Answer · 2014-08-21 04:33:21Z

1

You could use the array format for this:

object[$functionName] = function () {}

answered Aug 21, 2014 at 4:33

Cjmarkham

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