01_recap.rb

# RECAP!

# Data type

# String
"Le Wagon"
# Integer
12
# Float
12.2
# Booleans
true
false
# Range
(1..10) # includes the last element
(1...10) # DOES NOT include the last element

# Array
[]
['jana', 'bia', 'nominoe']

name = 'Andre'

puts name

02_if_and_elsif_else.rb

# if CONDITION
  # code if truthy
# end

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

condition = age >= 16

if condition
  puts 'You can vote'
else
  puts "You can\'t vote"
end

# if !(age >= 18)
unless age >= 18
  puts "You cannot drive!"
else
  puts "You can drive!"
end

03_coin_flip.rb

# Ternary Syntax

# CONDITION ? code_if_truthy : code_if_falsey

computer_coin = ['heads', 'tails'].sample

puts "heads or tails?"
guess = gets.chomp

verb = guess == computer_coin ? 'won' : 'loose'

puts "You #{verb}"

04_greet.rb

puts 'What time is it? (hour)'
hour = gets.chomp.to_i
# 24 hour clock

if hour < 12
  puts 'Good morning!'
elsif hour < 18
  puts 'Good afternoon!'
elsif hour >= 18
  puts 'Good evening!'
end

05_case_when.rb

puts 'What do you want to do? [read|write|exit]'
action = gets.chomp

# case action
# when 'read'
#   puts 'Entering the READ mode'
# when 'write'
#   puts 'Entering the WRITE mode'
# when 'exit'
#   puts 'See you soon! zo/'
# else
#   puts 'Wrong action...'
# end

case action
when 'read'
  puts 'Entering the READ mode'
when 'write'
  puts 'Entering the WRITE mode'
when 'exit'
  puts 'See you soon! zo/'
else
  puts 'wrong action'
end

06_store.rb

# OPEN  FROM 9  to 12
# CLOSE FROM 12 to 13
# OPEN  FROM 13 to 18

puts 'What time is it? (hour)'
hour = gets.chomp.to_i

if (hour >= 9 && hour < 12) || (hour >= 13 && hour < 18)
  puts 'STORE IS OPEN!'
else
  puts 'Store is CLOSED!'
end

07_right_price.rb

price = rand(1..5)

puts 'What is the price? (from $1 to $5)'
guess = gets.chomp.to_i

# while guess != price
#   puts 'What is the price? (from $1 to $5)'
#   guess = gets.chomp.to_i
# end

until guess == price
  puts 'What is the price? (from $1 to $5)'
  guess = gets.chomp.to_i
end

puts "You won! The price was #{price}"

08_array.rb

empty_array = []
students = ['hermione', 'ronald', 'draco']
# index          0          1        2

# READ
puts students[0]
puts students[1]
# students[array.length - 1] == students[-1] => both return the last elements
puts students[-1]

# MODIFY/UPDATE
students[2] = 'harry'

# APPEND a new element
students << 'luna'
students.push('luna')
students.insert(1, 'luna')

# DELETE/REMOVE an element
students.delete('luna')
# students.delete_at(0)

# SIZE/LENGTH
puts students.length
puts students.size

# LOOP EACH
p students
students.each do |student|
  puts student
end


# CRUD
# Create    << || push(element)
# Read      [index]
# Update    [index] = new_value
# Delete    .delete(element) || .delete_at(index)