Rest syntax in javascript

Question

There is a rule in JS: Never use arguments, opt to use rest syntax ... instead. Ok, let's try. I write:

let arr = [16, 'mother', 'kids'];

function concatenateAll(...arr) {
  return arr.join('');
}

But the output in the console doesn't satisfy the rule. Where is my mistake?

Who did you think set this rule? arguments still works fine if you want to use it. — Bergi
– Bergi, Commented Jul 13, 2018 at 16:33
"the output in the console doesn't satisfy the rule" - you are not outputting anything to the console. And what rule would it satisfy? — Bergi
– Bergi, Commented Jul 13, 2018 at 16:34
Possible duplicate of Do rest parameters allow for optimization? — zero298
– zero298, Commented Jul 13, 2018 at 16:36

Rikin · Accepted Answer · 2018-07-17 12:10:03Z

1

You did not call the function seems to be your problem.

let arr = [16, 'mother', 'kids'];

function concatenateAll(...arr) {
  return arr.join('');
}

console.log('Passing 3 individual arguments to the function returns: ', concatenateAll(...arr));

edited Jul 17, 2018 at 12:10

answered Jul 13, 2018 at 16:34

Rikin

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1 Comment

Andrew Li Over a year ago

This doesn't do the same thing.

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