Run a function with the values from an array for unknown array and function parameter length in Javascript

Question

This function basically should behave like the apply-function in Scheme, just rebuild in Javascript. So I have a given function f with n parameters and an array of length n.

Is there a way to call a function with the values of the array when I don't know how many parameters the function is going to have before hand?

For instance if the function was:

var f = function (x,y,z) {return x+y+z;};

And the Array was [1,2,3], is there a way to call f in a for loop or similar with the values without knowing beforehand how many params f is going to have?

Does this answer your question? Pass unknown number of arguments into javascript function — Sivakumar Tadisetti
– Sivakumar Tadisetti, Commented Aug 24, 2020 at 9:20

Vivek Singh · Accepted Answer · 2020-08-24 09:28:50Z

0

const a = (...args)=>  args.reduce((result,number)=> result+number);

You can use spread operator on a function and it can handle n number of parameters and if you try to use args inside the function it will be in a form of array and the order will be same as that of the parameter passed when calling the function

answered Aug 24, 2020 at 9:28

Vivek Singh

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1 Comment

Lazerbeak12345 Over a year ago

This is great but doesn't work in ES3. Function.apply along with the arguments keyword would work in that case, however.

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