Scope!

code_examples.js

//1.  nothing

// 2. 

console.log('Hey there')

// 3. Hey there, new line, goodbye

console.log('Hey there')
console.log('Goodbye')

// 4. Goodbye, Hey there

function sayHello () {
  console.log('Hey there')
}

console.log('goodbye')
sayHello()

// 5. Tyson

var bestFriend = 'Tyson'

function sayNameOfFriend() {
  console.log(bestFriend)
} 

sayNameOfFriend()

// 5. Hussain

var bestFriend = 'Tyson'

function sayNameOfFriend() {
  bestFriend = 'Hussain'
  console.log(bestFriend)
} 

sayNameOfFriend()

// 6. Tyson, Hussain

var bestFriend = 'Tyson'

function sayNameOfFriend() {
  bestFriend = 'Hussain'
  console.log(bestFriend)
} 

console.log(bestFriend)
sayNameOfFriend()

// 6. Tyson, Hussain, Hussain || Tyson, Hussain, Tyson ? 

var bestFriend = 'Tyson'

function sayNameOfFriend() {
  var bestFriend = 'Hussain'
  console.log(bestFriend)
} 

console.log(bestFriend)
sayNameOfFriend()
console.log(bestFriend)

notes.md

Goals:

1. Read code
   1. As a general programmer
   2. As a JAVASCRIPT programmer

• read and evaluate code in our heads
  • not just from top to bottom, but as a computer would run it

2. A rudimentary understanding of SCOPES

• scope chain (call stack)
  • identify different levels of scope

We used Javascript Tutor (http://pythontutor.com/javascript.html#mode=edit)

Take a look at other instructor's lecture notes as well! There's tons of great stuff on Compass :)

Here are some examples from the last time I did this lecture: https://github.com/NimaBoscarino/scope-notes

Cheers,

Nima