Delete duplicate elements from Array in Javascript -


this question has answer here:

i have array obejcts email , id want delete duplicate elements have similar id's.

example:

var newarray=[     {         email:"test1@gmail.com",         id:"a"     },     {         email:"test2@gmail.com",         id:"b"     },     {         email:"test3@gmail.com",         id:"a"     },     {         email:"test4@gmail.com",         id:"c"     },     {         email:"test4@gmail.com",         id:"c"     } ];

now need delete duplicate elements have id's common.in sence expecting final array is

var finalarray=[     {         email:"test1@gmail.com",         id:"a"     },     {         email:"test2@gmail.com",         id:"b"     },       {         email:"test5@gmail.com",         id:"c"     } ];

use array.prototype.filter filter out elements , keep check of duplicates use temp array

var newarray = [{    email: "test1@gmail.com",    id: "a"  }, {    email: "test2@gmail.com",    id: "b"  }, {    email: "test3@gmail.com",    id: "a"  }, {    email: "test4@gmail.com",    id: "c"  }, {    email: "test5@gmail.com",    id: "c"  }];       // array keep track of duplicates  var dups = [];  var arr = newarray.filter(function(el) {    // if not duplicate, return true    if (dups.indexof(el.id) == -1) {      dups.push(el.id);      return true;    }      return false;      });    console.log(arr);


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