/*
	The goal is to replace the default greeting function of a user object
	via an object that contains the reference of the default greeting function
*/


// An object contains all the shared functions
var sharedFunctions = {
    greeting: function() {
        console.log('Hi there');
    }
};

// An object create by an anonymous function
var user;

// ----------------------
// Pass the sharedFunctions object to create a user object
// In my case, I have no way to modify the code in the anonymous function
(function(funcs) {

    function User() {
        this.greeting = funcs.greeting;
        this.ref = funcs; //we store a reference to sharedFunctions
    };
    user = new User();
})(sharedFunctions);
// ----------------------
user.greeting(); // Hi there


// Trying to replace the greeting function of the user object
// via the sharedFunctions object
sharedFunctions.greeting = function() {
    console.log('Hello my friend');
};

user.ref.greeting(); // Hello my friend

// the user object contains the reference of the default greeting function
// replace the reference of the greeting function of the sharedFunctions object
// will not effect the user object.
Setting Validate Copy Format