Removing duplicate values from an array of elements by invoking the function

Question

I want the following function, when invoked to return an array of elements without duplicates

const removeDuplicates = nums => {
 var result = Array.from(new Set(nums));
  console.log(result)   
}
removeDuplicates([1,1,2,2,3])

Basically, I want this function to work without console.log but with invocation of it, like so removeDuplicates([1,1,2,2,3]) Please note that return is not working in this case as it stops the function from being invoked.

P.S. I have read a lot of answers related to my question, however they are not specifically answering my question; in particular, I want to invoke the removeDuplicates function with provided array of elements, like so: removeDuplicates([1,1,2,2,3]) and I expect it to return the elements without duplicates.

Yes, thanks, the repl on which I was trying code was not working, I guess because I have chosen to create JS/HTML/CSS repl instead of just Javascript — tseeker
– tseeker, Commented Apr 7, 2019 at 23:34
In that repl can log to console or do something in the dom with the results. The script is running, you just aren't doing anything with the results — charlietfl
– charlietfl, Commented Apr 7, 2019 at 23:35

charlietfl · Accepted Answer · 2019-04-07 23:32:04Z

2

I expect it to return the elements

So add a return

const removeDuplicates = nums => {
  return Array.from(new Set(nums));
}

const res = removeDuplicates([1, 1, 2, 2, 3])

console.log(res)

Or use an implicit return

const removeDuplicates = nums => Array.from(new Set(nums));

edited Apr 7, 2019 at 23:32

answered Apr 7, 2019 at 23:25

charlietfl

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5 Comments

tseeker Over a year ago

Yes, that is very logical/correct; however it is not working, I am trying it on repl, here is the link: repl.it/@umbur/FaintSlushyModel

charlietfl Over a year ago

I don't see you doing anything with res in the repl

tseeker Over a year ago

The code that you've provided is in script.js of that repl; however it works fine on this repl, which was created by choosing only JS: repl.it/@umbur/HotSerpentineProcedurallanguage

charlietfl Over a year ago

Understand ... add this and run again document.body.innerHTML = JSON.stringify(res) and if you log to console the repl console will work

tseeker Over a year ago

Does not work, but I guess it is not important, as the issue is solved now; thanks again!

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