Passing scope argument in Controller in Module in AngularJS

It is not mandatory to pass the $scope argument in the array, you can do as follows:

myApp.controller('MainCtrl', function ($scope) {

//Your code here

});

If I'm not getting what you meant, than let me know and I'll explain it to you furthermore !

You're actually not passing the $scope object as the first thing, you're declaring that your code depends on the $scope object to angular's DI system. Omitting it has the same result, but it doesn't work when minified, which is why the array syntax is preferred for minification.

I am also new to AngularJS but I am sure I can answer your question partially.

(1): The first variable in the array is assigning a name to the first argument in the function. That is required for minification. See "A Note on Minification": http://docs.angularjs.org/tutorial/step_05

(2): I am not 100% sure, but I would guess the $scope in the function signature is part of AngularJS approach for dependency injection. In this case, it is using a constructor-based dependency injection.

Keep in mind that there are tree kinds of dependency injection: constructor injection, setter injection, interface injection.

As seen in the AngularJs documentation for controllers, you can use a simpler way to set your controllers in your app. Your example can also be written like :

myApp.controller('MainCtrl', function ($scope) {

    $scope.text = 'Hello, Angular fanatic.';

}

More, Angular gives you the possibilty to inject many things as controller arguments in the order you want. So this is also possible to type :

myApp.controller('MainCtrl', function (customService1, customService2, $scope) {

    $scope.text = 'Hello, Angular fanatic.';

}

And the $scope variable will always be right set.

The "array" way to declare your controller is used to avoid problems occuring when you minify your angular scripts, cause minifiers transform '$scope' in something like 'a' then the Angular parsing will fail.

So, you got two solutions :

• Write your controllers with the 'array' notation if you want to minify your scripts with regular minifiers.

or

• Write your controllers with the 'simple' notation if you don't minify your scripts OR if you use ng-min or something like that (I recommend this way).