javascript - Duplicate-free version of array of objects -

i implemented function creates duplicate-free version of array, doesn't work array of objects. don't understand , can't find information how fix it.

my function:

function uniq(array) {     var length = array.length;      if (!length) {         return;     }      var index = 0;     var result = [];      while (index < length) {         var current = array[index];         if (result.indexof(current) < 0) {             result.push(current);         }         index++;     }      return result; } 

example:

var my_data = [         {         "first_name":"bob",         "last_name":"napkin"     },     {            "first_name":"billy",         "last_name":"joe"     },      {         "first_name":"billy",         "last_name":"joe",     } ]  uniq([1, 1, 2, 3]) // => [1, 2, 3]  uniq(my_data) // => [ { "first_name":"bob", "last_name":"napkin" }, { "first_name":"billy", "last_name":"joe" }, { "first_name":"billy", "last_name":"joe" } ] 

do know how creates duplicate-free version of array of objects?

indexof() in javascript not perform deep comparison of objects. on top of that, 2 objects created never "equal" each other. if do:

var = {}; var b = {}; == b; //false === b; //false 

you need perform deep comparison against values (if that's you're looking do, because there other equalities you're looking for). won't go how deep comparison because, well, google.