Newb to node?

gistfile1.txt

// procedural programming - synchronous
var foo = 'foo';
foo += 'bar';
// foo = 'foobar'

// object oriented programming  - synchronous
 var Bar = function(a){ return a }
var foo = new Bar({ id: 123 })
foo.id = 123;

// functional programming - potentially asynchronous
var callback = function(error, data){
  if (error) { return console.error(error);
  data.callbackAdded = true;
  return data;
}

var bar = function(cb){
  var good = true;
  if (!good){
    cb('not good'); 
  } else {
    cb( null, {
      barAdded : true 
    })
  }
}

var foo = bar( callback );
// foo = { barAdded: true, callbackAdded: true }

// don't do
var foo = bar( callback() );
// the () is what activates the function, and it will execute before the container (bar) function

// script1
//synchronous is blocking
var database = getDatabaseSync();
console.log( 'a', timer )

// big difference ^v^v^v^

// script2
// asynchronous is not
getDatabase( function(err, db) {
  console.log('b', timer)
  db.connect(...);
})
console.log('c', timer);

// if run simultaneously, script 2 'c' would fire before a or b