simple example of dependency injection

dependency-injection-example.js

var dependable = require('dependable'),
    container = dependable.container();

// Could be your db connection
var mongoose = {}

// Random dependency
container.register('anotherDependency', 'I do nothing right now');

// The dbAdmin "module" could be another that we want to make that might
// require some dependency/functionality from another module
// and even possibly extend it.

container.register('dbAdmin', function (database, anotherDependency) {
  var dbAdmin  = {};

  //here for example we overide the standard showCollections and do
  //something else
  dbAdmin.showCollections = function showCollections() {
    return [      
      "I'm the dbAdmin module and I show you some stuff",
      'Collections ' + database.showCollections(),
      'Other dependancey... '+anotherDependency
    ].join('\n');
  };
  return dbAdmin;
});

// We can register the database and other modules can depend on it
// in reality we would be doing more interesting things but this is 
// pretty obvious example

container.register('database', {
  connection: mongoose,
  showCollections : function() {
    return { "users": {}, "articles" : {} };
  }
});

// Finaly we resolve our "module"
container.resolve({}, function (dbAdmin) {
  console.log(dbAdmin.showCollections());
});