travishen

var 
  // JavaScript is liberal about white space!
  firstname,
    
  // JavaScript is so liberal about white space!!
  lastname,
    
  // JavaScript is such liberal about white space!!!
  // Oh my god!
  email;

travishen

class BaseChanger:    
    BASE = 10
    NEW_BASE = None
    MINUS_SIGN = False
    
    def __init__(self, n, new_base, n_base=BASE):
        
        self.NEW_BASE = new_base
        if n_base:
            self.BASE = n_base

travishen

// Function Statement 

greet(); // hoisting
function greet(){
    console.log('hi');
};

// FUNCTION EXPRESSION (ANONYMOUS)

anonymousGreet(); // undefined is not a function

travishen

travishen

// Global variable
var greeting = 'Hola';

// Immediately Invoked Function Expressions
(function(global, name) {
  
  var greeting = 'Hello';  
  consoel.log(global.greeting); // 'Hola'  
  console.log(greeting + ' ' + name); // 'Hello John'
  

travishen

function greet(whattosay) {
  
  return function(name) {
    consoel.log(whattosay + ' ' + name); // include variable whattosay by scope chain
  }

}

greet('Hello')('John'); // 'Hello John'

travishen

function buildFunctions() {
  
  var arr = [];
  
  for(var i=0; i<3; i++) {
          
    // add three function to arr
    arr.push(
      function() {
        console.log(i);

travishen

function makeGreeting(language) {
  return function(name){
    if(language == 'en') console.log('Hello' + name);
    if(language == 'es') console.log('Hola' + name);
  }
}
var greetEnglish = makeGreeting('en');
greetEnglish('John'); // Hello John

travishen

function sayHiLater() {
  
  var greeting = 'Hi';
  
  // uses first-class function and create a function object on the flay by function expressions
  setTimeout(function() {
    console.log(greeting); // 30 sec later, it still have access to greeting variable
  }, 30000);

}

travishen

function callLater(callback) {
  
  console.log('Some work...');
  
  callback();
  
}

callLater(function() {