metasansana

/*The Great Dependency Injection.*/

//This is psuedo code. Screw the syntax rules!

//No dependency injection.
class User {

    private Database db;

    private String email;

metasansana

var ns= {};

ns.Object = function () {
  
  var that = {};
  
  that.toString =  function () {
    
    return 'I am an Object!!';
  }

metasansana

//One of the popular concepts in OOP style programming is the concept of loose coupling.
//Your objects should have everything they need to carry out their duties from the time you instansiate them (new Object).
//Failing that, you should be able to inject any missing dependecies into your classes whenever necessary.
//This does not mean you go and create a whole bunch of setters.


//Wrong!

dog  = new Animal();
dog.setColor('blue');

metasansana

s

metasansana

Does this work?

metasansana

function outer (outerArg) {
  
  
  return function (innerArg) { // closure function
    
    
    return outerArg+innerArg;
    
  };

metasansana

 
func outer (outerArg int) func(int) { //this could also be a custom type
  
  
  return func (innerArg int) int { // closure func
    
    
    return outerArg+innerArg;
    

metasansana

function outer (int $outerArg) { //this could also be a custom type
  
  
  return function (int $innerArg)  { // closure function
    
    
    return $outerArg+$innerArg;
    
  }
  

metasansana

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metasansana

/**
 * Email is a wrapper around the keystone Email object.
 * @class Email
 *
 * @constructor
 *
 */
module.exports = function Email(name, keystone, nunjucks) {

	return new keystone.Email({