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AngularJs call one method of controller in another controller .

By Upendra -
I have seen many question about calling one method of one controller in another controller or extending scope of one controller in another controller.so here are the ways. if you want to call one controller into another or extending scope of controllers there are four methods available $rootScope.$emit() and $rootScope.$broadcast() If Second controller is child ,you can use Parent child communication . Use Services Kind of hack - with the help of angular.element() 1. $rootScope.$emit() and $rootScope.$broadcast() Controller and its scope can get destroyed, but the $rootScope remains across the application, that's why we are taking $rootScope because $rootScope is parent of all scopes . If you are performing communication from parent to child and even child wants to communicate with its siblings, you can use $broadcast If you are performing communication from child to parent ,no siblings invovled then you can use $rootScope.$emit HTML <body ng-app = ...
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Closures in javascript and how do they work ?

By Upendra -
JavaScript Closures for Dummies  Closures Are Not Magic This page explains closures so that a programmer can understand them — using working JavaScript code. It is not for gurus or functional programmers. Closures are  not hard  to understand once the core concept is grokked. However, they are impossible to understand by reading any academic papers or academically oriented information about them! This article is intended for programmers with some programming experience in a mainstream language, and who can read the following JavaScript function: function sayHello ( name ) { var text = 'Hello ' + name ; var sayAlert = function () { alert ( text ); } sayAlert (); } An Example of a Closure Two one sentence summaries: a closure is the local variables for a function — kept alive  after  the function has returned, or a closure is a stack-frame which is  not deallocated  when the function returns (as if a 'stack-fr...
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Working with $scope.$emit , $scope.$broadcast and $scope.$on

By Upendra -
First of all, parent-child scope relation does matter. You have two possibilities to emit some event: $broadcast  -- dispatches the event downwards to all child scopes, $emit  -- dispatches the event upwards through the scope hierarchy. If scope of  firstCtrl  is parent of the  secondCtrl  scope, your code should work by replacing  $emit  by  $broadcast  in  firstCtrl : function firstCtrl ( $scope ) { $scope . $broadcast ( 'someEvent' , [ 1 , 2 , 3 ]); } function secondCtrl ( $scope ) { $scope . $on ( 'someEvent' , function ( event , mass ) { console . log ( mass ); }); } In case there is no parent-child relation between your scopes you can inject  $rootScope  into the controller and broadcast the event to all child scopes (i.e. also  secondCtrl ). function firstCtrl ( $rootScope ) { $rootScope . $broadcast ( 'someEvent' , [ 1 , 2 , 3 ]); } Finally, when you need to ...
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