How to javascript remove duplicate item

Question

I use javascript to get response data from firebase result. Now I have list item respone like

Luxury
Sedan
MPV
Hatchback
SUV
Luxury
Luxury
Luxury
Luxury

Now I want to display this respone on HTML, but no have duplicate more name luxury.

I try to use

var uniqueNames = [];
            $.each(names, function(i, el){
                if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el);
            });

With names is my list respone, but it not a array. What I wrong in here, please help me to find a way to fix it

Thanks a lot

you can follow data this image link image response here

Possible duplicate of [Remove Duplicates from JavaScript Array](https://stackoverflow.com/questions/9229645/remove-duplicates-from-javascript-array) — Rajesh, Jul 27 '17 at 06:14

score 0 · Answer 1 · answered Jul 27 '17 at 06:18

Time to switch to Set from ES6

Set objects are collections of values. You can iterate through the elements of a set in insertion order. A value in the Set may only occur once; it is unique in the Set's collection

const uniq = new Set(['Luxury',
  'Sedan',
  'MPV',
  'Hatchback',
  'SUV',
  'Luxury',
  'Luxury',
  'Luxury',
  'Luxury'
])

for (let item of uniq.keys()) console.log(item)

score 0 · Answer 2 · answered Jul 27 '17 at 06:20

0

I not sure whats the problem on your situation, maybe you can provide the response data from database and the end result you get. We might figure out wheres the problem located.

But here is an alternative way to do it.

var uniqueNames = names.filter(function(elem, index, self) {
     return index == self.indexOf(elem);
})

Hope it help.

answered Jul 27 '17 at 06:20

Dean

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you can follow data response on my description, I just updated, thanks – Thuy Vi Nguyen Jul 27 '17 at 06:30
for now my data is string, it not array, so I can't use your code suggestion – Thuy Vi Nguyen Jul 27 '17 at 06:31
sorry, got confused, is the response from db is 1 by 1, instead of a list? It doesn't look like a list's response from the screenshot you provide – Dean Jul 27 '17 at 06:38

How to javascript remove duplicate item

Thanks a lot

2 Answers2