Javascript - Merge two dimensional array with unique result

Question

I have this two array in Javascript

var array1 = [
              ["Tech & Digital", 124],
              ["Stationery", 100]
             ]
var array2 = [
              ["Gift Item", 125],
              ["Stationery", 100]
             ]

I want to merge this 2 array with unique value as follows,

            [
              ["Tech & Digital", 124],
              ["Stationery", 100],
              ["Gift Item", 125]
             ]

I tried concat function, but it's not working as expected.

Answer 1

Are you using nested arrays to emulate an object that preserves order? If so, then write a container object that handles the sorting for you.

If not, you can use Underscore or Lo-Dash:

_.uniq(_.union(array1, array2), false, JSON.stringify)

Since [1] != [1], you have to compare them manually. JSON.stringify is one (hacky) way of doing it.