AngularJS : How to get the unique values in ng-option?

Question

I have the following data in a table:

data = [
  {id: 1, name: 'Manchester United', type: 'Soccer', featured: true, country: 'England'},
  {id: 2, name: 'Manchester City', type: 'Soccer', featured: false, country: 'England'},
  {id: 3, name: 'Dallas Mavericks', type: 'Basketball', featured: true, country: 'USA'},
  {id: 4, name: 'Indian Cricket Team', type: 'Cricket', featured: true, country: 'India'},
  {id: 5, name: 'Australian Cricket Team', type: 'Cricket', featured: false, country: 'Australia'},
  {id: 6, name: 'Los Angeles Lakers', type: 'Basketball', featured: true, country: 'USA'},
  {id: 7, name: 'Los Angeles Clippers', type: 'Basketball', featured: false, country: 'USA'}
];

I want to add a drop down box with countries. Selecting a country should filter the table to show only sports from that country.

The problem is that I am unable to show the unique countries in the dropdown.

Kindly Help...Thanks in advance.

Answer 1

I modified your plnkr, http://plnkr.co/edit/60GO0zhSGoEUm7tu6mbc?p=preview

Filter: as it is from ng-options and unique filter not displaying angular.js

Select part: <select data-ng-model="countryModel" ng-options="dd.country as dd.country for dd in data | unique:'country'">

ng-repeat part <tr data-ng-repeat="dat in data | filter: countryModel" data-ng-style="set_color(dat)">