Asynchron IO and how it executes.

async.js

/**
 * Created by WARMACHINE on 2015-09-22.
 */

// Example of code execution in a asynchron enviroment
// For simulate lag from db, timeouts will be used.

console.log('I will execute first');
var delay1 = 0;
setTimeout((function() {
    delay1 = 1;
    console.log('I\'m since long forgotten');
}), 500);

if(delay1) {
    console.log('I will execute when timeout is done.');
} else {
    console.log('I did not execute at all.');
}
console.log('I will execute third');

if((function() { return setTimeout((function() { return true; }),500)})) {
    console.log('But we will wait for this.');
}

console.log('Before this...');