How to return non-duplicate values of array of object

Question

var newarray= 
[ { value: 'Large', name: 'Size' },
{ value: 'Red', name: 'Color' },
{ value: 'Cotton', name: 'Material' },
{ value: 'Affinity', name: 'Collection' },
{ value: 'Pine Montage', name: 'Style' },
{ value: 'Large', name: 'Size' },
{ value: 'Red', name: 'Color' },
{ value: 'Jute', name: 'Material' },
{ value: 'Affinity', name: 'Collection' },
{ value: 'Pine Montage', name: 'Style' },
{ value: 'Large', name: 'Size' },
{ value: 'Green', name: 'Color' },
{ value: 'Jute', name: 'Material' },
{ value: 'Affinity', name: 'Collection' },
{ value: 'Pine Montage', name: 'Style' } ];

Here is my array i need to find unique array of object with non-repeated values in an array ,Please help

So perhaps loop through the input array, adding items to another array if they're not already present? Where are you stuck? — nnnnnn
– nnnnnn, Commented Mar 5, 2016 at 7:08
can you tell me how i will compare object of new temp array and the old array — sunnyn
– sunnyn, Commented Mar 5, 2016 at 7:15

Nina Scholz · Accepted Answer · 2016-03-05 09:15:59Z

I suggest to iterate over the array and filter the items with a look up if the item is stored in a hash map.

var array = [{ value: 'Large', name: 'Size' }, { value: 'Red', name: 'Color' }, { value: 'Cotton', name: 'Material' }, { value: 'Affinity', name: 'Collection' }, { value: 'Pine Montage', name: 'Style' }, { value: 'Large', name: 'Size' }, { value: 'Red', name: 'Color' }, { value: 'Jute', name: 'Material' }, { value: 'Affinity', name: 'Collection' }, { value: 'Pine Montage', name: 'Style' }, { value: 'Large', name: 'Size' }, { value: 'Green', name: 'Color' }, { value: 'Jute', name: 'Material' }, { value: 'Affinity', name: 'Collection' }, { value: 'Pine Montage', name: 'Style' }],
    unique = function (a) {
        var o = {};
        return a.filter(function (b) {
            var k = b.name + '|' + b.value;
            if (!(k in o)) {
                o[k] = true;
                return true;
            }
        });
    }(array);

document.write('<pre>' + JSON.stringify(unique, 0, 4) + '</pre>');

isvforall · Accepted Answer · 2016-03-05 13:31:58Z

0

You can use Set for getting unique values

var uniq = Array.from(new Set(newarray.map(function(a) {
    return JSON.stringify(a);
}))).map(function(a) {
    return JSON.parse(a)
});

console.log(uniq); // will print your unique values

answered Mar 5, 2016 at 13:31

isvforall

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