Angular.ForEach

<!DOCTYPE html>
<html>

  <head>
    <script data-require="angularjs@1.5.5" data-semver="1.5.5" src="https://code.angularjs.org/1.5.5/angular.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body ng-app="app" ng-controller="BaseController">
    <h1>{{title}}</h1>
    
    <br/><br/>
    List:
    
    <br/><br/>
    {{list}}
    
    <br/><br/>
    Using ng-repeat:
    
    <br/><br/>
    <div ng-repeat="listItem in list">
      {{listItem}}
    </div>
    
    <br/><br/><br/><br/>
    Enter the group number to filter: 
    <input type="number" ng-model="groupNumber" />
    <button ng-click="findByGroup()">Submit</button>
    <br/><br/>
    {{group}}
    
    <br/><br/><br/><br/>
    <a href="runTest.html">Run Tests</a>
  </body>

</html>

// Code goes here

var app = angular.module("app", []);

app.controller("BaseController", function($scope) {
  $scope.title = "Angular.ForEach";
  $scope.list = [
    {firstname: 'shashikanth', lastname: 'Kota', group: 1},
    {firstname: 'Rishikanth', lastname: 'Kota', group: 2},
    {firstname: 'Nishikanth', lastname: 'Kota', group: 3},
    {firstname: 'Lavanya', lastname: 'Kota', group: 1},
    {firstname: 'Riya', lastname: 'Kota', group: 1}
  ];
  
  $scope.findByGroup = function() {
    var group = [];
    angular.forEach($scope.list, function(value, key){
      if(value.group === $scope.groupNumber){
        this.push(value);
      }
    }, group);
    $scope.group = angular.bind(this, group);
  }
});

/* Styles go here */

Angular.ForEach

for-loop uses index, with that index we load the object and process it.
forEach-loop uses iterator.

Iterator has index, value. value = object.
So it will be easy to handle the object.

describe('Testing BaseController', function() {
  var $scope = null;
  var ctrl = null;

  //you need to indicate your module in a test
  beforeEach(module('app'));

  beforeEach(inject(function($rootScope, $controller) {
    $scope = $rootScope.$new();
    ctrl = $controller('BaseController', {
      $scope: $scope
    });
  }));

  it('should set title', function() {
    expect($scope.title).toEqual('Angular.ForEach');
  });
  
  it('should init the list', function() {
    var list = [
      {firstname: 'shashikanth', lastname: 'Kota', group: 1},
      {firstname: 'Rishikanth', lastname: 'Kota', group: 2},
      {firstname: 'Nishikanth', lastname: 'Kota', group: 3},
      {firstname: 'Lavanya', lastname: 'Kota', group: 1},
      {firstname: 'Riya', lastname: 'Kota', group: 1}
    ];
    expect($scope.list).toEqual(list);
  });
  
  it('should filter the list with groupNumber', function() {
    $scope.groupNumber = 1;
    $scope.findByGroup();
    expect($scope.group.length).toEqual(3);
    expect($scope.group[0]).toEqual({firstname: 'shashikanth', lastname: 'Kota', group: 1});
    
    $scope.groupNumber = 2;
    $scope.findByGroup();
    expect($scope.group.length).toEqual(1);
    expect($scope.group[0]).toEqual({firstname: 'Rishikanth', lastname: 'Kota', group: 2});
  })
  
});

<html>
  <head>
    <link rel="stylesheet" href="style.css">
  </head>

  <body ng-app="app" ng-controller="BaseController">
    <a href="index.html"><h1>{{title}}</h1></a>
    <!-- Add Jasmine -->
    <script data-require="jasmine@*" data-semver="2.0.0" src="//cdn.jsdelivr.net/jasmine/2.0.0/jasmine.js"></script>
    <!-- Jasmine html & css for reporting -->
    <link data-require="jasmine@*" data-semver="2.0.0" rel="stylesheet" href="//cdn.jsdelivr.net/jasmine/2.0.0/jasmine.css" />
    <script data-require="jasmine@*" data-semver="2.0.0" src="//cdn.jsdelivr.net/jasmine/2.0.0/jasmine-html.js"></script>
    <script data-require="jasmine@*" data-semver="2.0.0" src="//cdn.jsdelivr.net/jasmine/2.0.0/boot.js"></script>
    <!-- Add AngularJS -->
    <script data-require="angular.js@1.2.25" data-semver="1.2.25" src="https://code.angularjs.org/1.2.25/angular.js"></script>
    <!-- AngularJS testing helpers -->
    <script data-require="angular-mocks@*" data-semver="1.2.16" src="https://code.angularjs.org/1.2.16/angular-mocks.js"></script>
    
    <script src="script.js"></script>
    <script src="spec.js"></script>
  </body>

</html>