index.rb

# everything in ruby is truthy apart from nil and false

# truthy 
"string"
1
1.0
["hi"]
{hi: "hello"}

# falsy
nil
false

# to test if something is truthy or falsy
!!"string"

# an example of where you'd have a nil value in your if statement

database = [
  {name: "harrison"},
  {name: "ed"}
]

found_user = database.find do |user|
  user[:name] == "nic"
end 

if !found_user
  puts "this is a new user"
else 
  puts "the user exists"
end

# ternary operator

bright = true
house_lights_message = bright ? "Turn down the lights" : "It's very dark in here"

# methods
def burger_menu
  puts "welcome to burger joint 🍔"
  puts ""
  puts "heres the menu"
  puts "1. cheeseburger"
  puts "2. vegan burger"
  puts "3. chicken burger"
  puts "4. ultimate double whopper with fries"
  puts ""
end 

def get_user_input 
  puts "please place an order"
  print "> "
  user_selection = gets.chomp.to_i
  return user_selection
end 

def burger_selection(user_selection)
  case user_selection
  when 1
    puts "you ordered a cheeseburger"
  when 2 
    puts "you ordered a vegan burger"
  when 3 
    puts "you ordered a chicken burger 🐔"
  when 4 
    puts "you ordered a ultimate double whopper with fries"
  else 
    puts "wrong user input"
  end 
end 

# calling 3 methods
burger_menu()
user_selection = get_user_input()
burger_selection(user_selection)

# scope

# what is scope?

# file scope, global scope, scope outside of methods
# method scope, scope inside of methods
# one approach you can take to handling scoping issue is passing arguments to methods

# this variable is in the global file scope
my_variable = "hi"

def sum
  # this variable is in the method scope
  another_variable = "sup"
end