Why is the variable name “$scope” necessary ?

Question

I\'m fairly new to Javascript ( just finished the book Eloquent Javascript ), and am currently reading AngularJS from O\'Reilly. And getting this small snippet of code to w

Answer 1

Both previous answers are correct , just you should know that you can "override" the default behavior if you're declaring a controller this way:

module.controller("ControllerName",["$scope",function( custom_name ){ ... }]);

Example:

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

app.controller("TextController",["$scope",function(glue){
    glue.name1 = "John";
    glue.name2 = "Paul";
    glue.name3 = "George";
    glue.name4 = "Ringo";
}]);

and then:

    Hello {{ name1 }}, {{ name2 }}, {{ name3 }}, {{ name4 }}!

Working here: http://jsfiddle.net/d4M2P/