Javascript use variable name to thread a function? [duplicate]

Question

In GSC, you are able to make a variable become the name of a function that you thread. It looks like this:

variable = "pizza";
[[variable]]();

the engine then reads it like:

pizza();

my question is, is it possible to do that in javascript as easily or do I have to make if/else/switch statements for it?

There are many similar questions, for example stackoverflow.com/questions/3619046/… — Denys Séguret
– Denys Séguret, Commented May 23, 2015 at 14:25
@b2238488: Not really, that one talks about creating functions — Bergi
– Bergi, Commented May 23, 2015 at 14:32

Amit Joki · Accepted Answer · 2015-05-23 14:33:02Z

0

my question is, is it possible to do that in javascript as easily or do I have to make if/else/switch statements for it?

If you want to use the safe, fail-proof way, then you can access such variables only in two contexts.

If the variable is in global context, in the case of which, you can do window[variable]();
Else if the variable is a property of an object, in the case of which, you can do obj_name[variable](), basically anything that can be accessed via bracket notation. window is an object too.

Then there's always the dirty way:

You can use highly evil eval like eval(variable + "()") or you can use the Function constructor in the same way. Note however that both the methods can be misused and are highly advised against.

answered May 23, 2015 at 14:33

Amit Joki

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