remove duplicated array item

Question

var arr = ["Chandelier", "Big Girls Cry", "Burn the Pages", "Eye of the Needle", "Hostage", "Straight for the Knife", "Fair Game", "Elastic Heart", "Free the Animal", "Fire Meet Gasoline", "Cellophane", "Dressed In Black", "Chandelier", "Elastic Heart", "Chandelier", "Chandelier", "Elastic Heart", "Elastic Heart", "Big Girls Cry", "Big Girls Cry"];

 $.each(arr, function(i,obj){
console.log(obj);
});

How can I make sure my array is unique?

So are you asking for a method to remove duplicates using `$.each`? — Wes Foster, Mar 21 '16 at 14:41
It would be more obvious if you question stated something like "I have a constraint where I must do this in a `$.each` loop" — Jason P, Mar 21 '16 at 14:47
@NicholeA.Miler your question is asking how to dedupe the array _before_ you loop over it with `each`. — Andy, Mar 21 '16 at 14:49

Nina Scholz · Answer 1 · 2016-03-21T14:56:04.157

1

With Array#filter() and a temporary object.

var arr = ["Chandelier", "Big Girls Cry", "Burn the Pages", "Eye of the Needle", "Hostage", "Straight for the Knife", "Fair Game", "Elastic Heart", "Free the Animal", "Fire Meet Gasoline", "Cellophane", "Dressed In Black", "Chandelier", "Elastic Heart", "Chandelier", "Chandelier", "Elastic Heart", "Elastic Heart", "Big Girls Cry", "Big Girls Cry"],
    unique = arr.filter(function (a) {
        if (!this[a]) {
            this[a] = true;
            return true;
        }
    }, {});    
    
document.write('<pre>' + JSON.stringify(unique, 0, 4) + '</pre>');

edited Mar 21 '16 at 14:56

answered Mar 21 '16 at 14:41

Nina Scholz

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I'm using $.each to get each name and push it somewhere, how does this help in my case? – Nichole A. Miler Mar 21 '16 at 14:43
2

why do you need $.each? – Nina Scholz Mar 21 '16 at 14:45
1

@NinaScholz -- Probably the OP. +1 from me because your answer did indeed answer the question that was asked...not the question that wasn't asked. :) – Wes Foster Mar 21 '16 at 14:53

remove duplicated array item

1 Answers1