How to get unique data on an array in javascripts or jquery? [duplicate]

Question

I have array like this:

var arr = [
{"id":1,"tipe":"foo"},
{"id":2,"tipe":"bar"},
{"id":3,"tipe":"bar"}
];

how to get unique data on javascript or jquery, and show result like this:

[{"id":1,"tipe":"foo"},{"id":2,"tipe":"bar"}];

this is my code for get the data:

$('#tipe').change(function(){
                    var val = $(this).val();
                    url = '{{url('getdata')}}';
                    $.ajax({
                        url:url,
                        data: {tipe:val}
                    }).done(function(data){
                        $('#page').empty();
                        $.each(data, function(key, value){
                            $('#page').append(value['halaman']);
                        });
                    })
                });

Refer below links: stackoverflow.com/questions/2218999/… stackoverflow.com/questions/15125920/… — Mr. Raj Kale
– Mr. Raj Kale, Commented Oct 27, 2017 at 10:32

Carsten Løvbo Andersen · Accepted Answer · 2017-10-27 10:27:11Z

2

You can try using this code

var result = arr.reduce(function(t, el1) {
  var matches = t.filter(function(el2) {
    return el1.tipe == el2.tipe
  })
  if (matches.length == 0)
    t.push(el1)
  return t;
}, [])

Demo

var arr = [{
    "id": 1,
    "tipe": "foo"
  },
  {
    "id": 2,
    "tipe": "bar"
  },
  {
    "id": 3,
    "tipe": "bar"
  }
];

var result = arr.reduce(function(t, el1) {
  var matches = t.filter(function(el2) {
    return el1.tipe == el2.tipe
  })
  if (matches.length == 0)
    t.push(el1)
  return t;
}, [])

console.log(result)

answered Oct 27, 2017 at 10:27

Carsten Løvbo Andersen

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2 Comments

Master Yoda Over a year ago

Might be worth throwing a couple of comments in there to explain but otherwise good answer

Carsten Løvbo Andersen Over a year ago

@MasterYoda True, ill throw some comments in a sec

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