Flow & Array

crud_array.rb

cities = %w(rome paris perugia)
#       ["rome", "paris", "perugia"]
# index     0       1         2
#          -3      -2        -1     

# READ
cities[1]

# CREATE
# cities.push("New York")
cities << "New York"

# UPDATE
cities[2] = "london"

# DELETE
cities.delete_at(3)
# cities.delete("New York")

p cities # puts cities.inspect

# _CRUD_
# READ     [index]
# CREATE   <<
# UPDATE   [index] =
# DELETE   delete_at(index)

hello.rb

puts "What time is it?"
hour = gets.chomp.to_i

if  hour < 12
  puts "Good morning"
elsif hour > 20
  puts "Good evening"
elsif hour > 12
  puts "Good afternoon"
end

old_ui.rb

puts "Which action?"
action = gets.chomp

# if action == "read"
#   puts "Read mode"
# elsif action == "write"
#   puts "Write mode"
# elsif action == "exit"
#   puts "Exiting.."
# else
#   puts "Invalid input"
# end

case action
when "read"  then puts "Read mode"
when "write" then puts "Write mode"
when "exit"  then puts "Exiting.."
else 
  puts "wrong input"
end

price_is_right.rb

computer = rand(5)

guess = nil

# until guess == computer
while guess != computer
  puts "Try again"
  guess = gets.chomp.to_i
end

puts "You WIN!"

store.rb

puts "What time is it?"
hour = gets.chomp.to_i

is_morning   = hour >= 9 && hour < 12
is_afternoon = hour >= 15 && hour < 19 

if is_morning || is_afternoon 
  puts "It's open!"
else
  puts "It's close.."
end

ternary.rb

# puts "How old are you?"
# age = gets.chomp.to_i

# if age >= 18
#   puts "you can vote"
# else 
#   puts "you cannot vote"
# end

# # condition ? true_block : false_block
# answer = age >= 18 ? "you can vote" : "you cannot vote"
# puts answer


# HEADS or TAILS 
computer = ["heads", "tails"].sample

puts "Heads or Tails?"
answer = gets.chomp

outcome = answer == computer ? "Win" : "Lost"
puts outcome

# number.even? ? "EVEN" : "ODD"

vote.rb

puts "How old are you?"
age = gets.chomp.to_i

# if !age >= 18
unless age >= 18
  puts "you can vote"
else 
  puts "you cannot vote kiddo!"
end