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var arr = [1, 1, 1, 5, 3, 4, 6, 6] function uniqueRetriever(bla, boi) { ... } var unique = uniqueRetriever(bla, boi) console.log(unique); //output: [5, 3, 4]

How do I retrieve unique elements from an array without changing the original array?

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  • What is bla, boi here? Commented Jan 15, 2018 at 13:54
  • Please try searching before asking Commented Jan 15, 2018 at 13:55
  • 1
    @Pointy This is not duplicate of that question. Expected output is different Commented Jan 15, 2018 at 13:57
  • @Bharadwaj, now with right dupe. Commented Jan 15, 2018 at 14:03
  • @Bharadwaj I didn't vote to close it as a duplicate; I voted to close it as "too broad" or "where's the code". Commented Jan 15, 2018 at 14:03

1 Answer 1

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Try filter() like the following:

var arr = [1, 1, 1, 5, 3, 4, 6, 6]; var res = arr.filter(function (item, index, arr) { var count = 0; for(var i = 0; i < arr.length; ++i){ if(arr[i] == item) count++; } // check if item appears once then return item if(count == 1){ return arr.indexOf(item) === index; } }) console.log(res);

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@Bharadwaj, I have updated my answer. Thanks for correcting me.

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