How can I use a string name as a function call? If string = 'sum' and function is sum(a, b)? [duplicate]

Question

That's about it. I have a string = "sum" and a function named sum(a,b), how can I substitute my string to call that function;

string = "sum"
function sum(a,b)

So basically to call that function, I would want to execute it like

string(a, b)

Geez got downvoted for asking an existing question. Thanks for the help tho and pointing me to the right direction, still appreciate the help. — Dion
– Dion, Commented Aug 31, 2020 at 12:24

Zer0 · Accepted Answer · 2020-08-31 11:58:42Z

1

I suggest you use dictionary, where you define all existing functions:

const funcs = {
    sum: function(a, b) {

    },
    someStuff: function(r, f) {

    }
};
//call it:
funcs["sum"](a, b);

You can simply access your function via indexing with the strings

answered Aug 31, 2020 at 11:58

Zer0

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3 Comments

Dion Over a year ago

This worked, I also just found that window[funcName](a, b) is the best solution for this. Thanks for your answer! Definitely something I can use in the future.

Zer0 Over a year ago

oh yeah, this solution is "universal", as it works also in Node.js or backend wise but in a browser you can use the window object, sure

Dion Over a year ago

Thanks! Upvoted your answer btw, just won't reflect cause of reputation. I appreciate the shared knowledge good sir.

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