Angularjs-Category-Lists-count

You can use groupBy of angular.filter module.

so you can do something like this: Our ng-repeat receives a combination of (key, values[]) that we can use in our following iterations.

JS

var app = angular.module('catApp', ['angular.filter']);

app.controller('blogCtrl', function($scope, $rootScope) {
$rootScope.blogposts = [
    {
      post_title : 'Alfreds Futterkiste',
      post_category : 'social'
    },
    {
      post_title : 'Ana Trujillo Emparedados y helados',
      post_category : 'social'
    },
    {
      post_title : 'Antonio Moreno Taquería',
      post_category : 'news'
    },
    {
      post_title : 'Around the Horn',
      post_category : 'news'
    },
    {
      post_title : 'B Beverages',
      post_category : 'social'
    },
    {
      post_title : 'Berglunds snabbköp',
      post_category : 'social'
    },
    {
      post_title : 'Blauer See Delikatessen',
      post_category : 'business'
    },
    {
      post_title : 'Blondel père et fils',
      post_category : 'business'
    },
    {
      post_title : 'Bólido Comidas preparadas',
      post_category : 'business'
    },
    {
      post_title : 'Bon app',
      post_category : 'health'
    },
    {
      post_title : 'Bottom-Dollar Marketse',
      post_category : 'business'
    },
    {
      post_title : 'Cactus Comidas para llevar',
      post_category : 'health'
    },
    {
      post_title : 'Centro comercial Moctezuma',
      post_category : 'business'
    },
    {
      post_title : 'Chop-suey Chinese',
      post_category : 'business'
    },
    {
      post_title : 'Comércio Mineiro',
      post_category : 'health'
    }
  ];

  });

HTML

<ul>
    <li ng-repeat="(key, value) in blogposts | groupBy: 'post_category'">{{key}} <span>{{value.length}}</span></li>
  </ul>