Create unique array from array

Question

I have following Array

var x = [
  '{"id":"item1","val":"Items"}',
  '{"id":"item1","val":"Items"}',
  '{"id":"item2","val":"Items"}',
  '{"id":"item2","val":"Items"}',
  '{"id":"item3","val":"Items"}',
  '{"id":"item2","val":"Items"}'
];

I want create unique array by id key like following:

[
  '{"id":"item1","val":"Items"}',
  '{"id":"item2","val":"Items"}',
  '{"id":"item3","val":"Items"}'
];

check this: stackoverflow.com/questions/19501441/…

Avnesh Shakya
– Avnesh Shakya

2016-12-26 07:32:37 +00:00
Commented Dec 26, 2016 at 7:32 — Avnesh Shakya
– Avnesh Shakya, Commented Dec 26, 2016 at 7:32
Is x an array of strings or objects ?

Hmahwish
– Hmahwish

2016-12-26 07:32:52 +00:00
Commented Dec 26, 2016 at 7:32 — Hmahwish
– Hmahwish, Commented Dec 26, 2016 at 7:32

Sajeetharan · Accepted Answer · 2016-12-26 07:36:47Z

2

You can use array.filter

var x = [
  '{"id":"item1","val":"Items"}',
  '{"id":"item1","val":"Items"}',
  '{"id":"item2","val":"Items"}',
  '{"id":"item2","val":"Items"}',
  '{"id":"item3","val":"Items"}',
  '{"id":"item2","val":"Items"}'
];

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

console.log(unique);

answered Dec 26, 2016 at 7:36

Sajeetharan

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Comments

Nitesh · Accepted Answer · 2016-12-26 07:37:21Z

0

If you could use jQuery:

var obj = {};
$.each(x,function(index,val){
 var temp = JSON.parse(val);
 obj[temp.id] = val;
})

var tempArray = [];

for(var i in obj){
tempArray.push(obj[i])
}

console.log(tempArray);

answered Dec 26, 2016 at 7:37

Nitesh

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Comments

Leo · Accepted Answer · 2016-12-26 07:57:31Z

0

ES6 has been officially published one and half years ago, why not give it a try?

var unique = [...new Set(x)]

Set to remove the duplicates, ... to spread members in an iterable.

edited Dec 26, 2016 at 7:57

answered Dec 26, 2016 at 7:47

Leo

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