Best approach and efficient way to merge two array of object in to single array

Question

I have two arrays of object. These two array contain huge data. I want to merge this two array into one. What is the efficient way to do this?

ex:

var firstArray= [ {id:1, a:'b'}
                  {id:2, c:'d'}
                  ...
                ]

var secondArray= [ {id:1, z:'1'}
                   {id:2, y:'2'}
                   ...
                 ]

Output should look like:

var resultingArray= [ {id:1, a:'b',z:'1'}
                      {id:2, c:'d',y:'2'}
                      ...
                    ]

take a look at this https://github.com/KyleAMathews/deepmerge , is this what you are expecting ? — Robin, Apr 17 '15 at 11:14
it will take more time. if an array have n item and other have m item then it will loop n*m time.which take more time. — Mukund Kumar, Apr 17 '15 at 11:15

score 0 · Accepted Answer · edited May 23 '17 at 10:24

Taken from this answer:

function arrayUnique(array) {
    var a = array.concat();
    for(var i=0; i<a.length; ++i) {
        for(var j=i+1; j<a.length; ++j) {
            if(a[i] === a[j])
                a.splice(j--, 1);
        }
    }

    return a;
};

var array1 = ["Vijendra","Singh"];
var array2 = ["Singh", "Shakya"];
    // Merges both arrays and gets unique items
var array3 = arrayUnique(array1.concat(array2));

Best approach and efficient way to merge two array of object in to single array

1 Answers1