Question

84

Delete duplicate elements from Array in Javascript

rated 0 times [ 88] [ 4] / answers: 1 / hits: 26482 / 8 Years ago, tue, november 8, 2016, 12:00:00

I have array with obejcts email and Id so I want delete duplicate elements who have similar ID's.

Example:

var newarray=[

    {

        Email:[email protected],

        ID:A

    },

    {

        Email:[email protected],

        ID:B

    },

    {

        Email:[email protected],

        ID:A

    },

    {

        Email:[email protected],

        ID:C

    },

    {

        Email:[email protected],

        ID:C

    }

];

Now I need to delete Duplicate elements which have ID's are common.In the sence I am expecting final Array is

var FinalArray=[

    {

        Email:[email protected],

        ID:A

    },

    {

        Email:[email protected],

        ID:B

    },  

    {

        Email:[email protected],

        ID:C

    }

];

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kendellc

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2 Years ago

answered 8 Years ago luna · Accepted Answer

Use Array.prototype.filter to filter out the elements and to keep a check of duplicates use a temp array

var newarray = [{

  Email: [email protected],

  ID: A

}, {

  Email: [email protected],

  ID: B

}, {

  Email: [email protected],

  ID: A

}, {

  Email: [email protected],

  ID: C

}, {

  Email: [email protected],

  ID: C

}];

   

// Array to keep track of duplicates

var dups = [];

var arr = newarray.filter(function(el) {

  // If it is not a duplicate, return true

  if (dups.indexOf(el.ID) == -1) {

    dups.push(el.ID);

    return true;

  }



  return false;

  

});



console.log(arr);