01-flow.rb

puts "How old are you?"

age = gets.chomp.to_i

# Conditional Statements

# if / else structure
if age >= 18
  puts "You can vote!"
else
  puts "You're too young!! Go home!"
end

puts "Goodbye!"

puts "Pick a number?"
number = gets.chomp.to_i

# if/unless condition
#   ...
# end

# inline if
puts "Your number is even" if number.even?

# unless
puts "Your number is even" unless number.odd?

02-coin_toss.rb

puts "heads or tails?"
choice = gets.chomp
coin = ["heads", "tails"].sample

# standard if/else
# if choice == coin
#   result = "winner"
# else
#   result = "loser"
# end

# ternary operator
result = (choice == coin) ? "winner" : "loser"

puts "#{result}, that was #{coin}!"

03-greeting.rb

hour = Time.now.hour

if hour < 12
  puts "Good morning!"
elsif hour >= 20
  puts "Good night!"
elsif hour > 12
  puts "Good afternoon!"
else
  puts "Enjoy your lunch!"
end

04-interface.rb

puts "Which action? [read|write|list|exit]"
action = gets.chomp.downcase

case action
when "read"
  puts "You are in READ mode"
when "write"
  puts "You are in WRITE mode"
when "list"
  puts "You are in LIST mode"
when "exit"
  puts "Goodbye"
else
  puts "Chose a valid action!"
end

05-bootcamp.rb

hour = Time.now.hour

condition = (hour >= 9 && hour < 13) || (hour >= 14 && hour < 19)

if condition
  puts "The bootcamp is open!"
else
  puts "Sorry, come back later!"
end

06-looping.rb

price_to_find = rand(5)
choice = nil

# while choice != price_to_find
#   puts choice != price_to_find
#   puts "How much (between $0 and $5)?"
#   choice = gets.chomp.to_i
# end

until choice == price_to_find
  puts "How much (between $0 and $5)?"
  choice = gets.chomp.to_i
end

puts "You won! Price was #{price_to_find}"


if choice == price_to_find
  puts "You won! Price was #{price_to_find}"
end

for i in (1..10)
  puts i
end

for i in ["a", "b", "c"]
  puts i
end

07-arrays.rb

# ARRAYS

# CRUD

# Create
arr = Array.new
arr2 = [1, 4, 6]

p arr.class
p arr2

# Reading
#            0       1      2      ...
names = ["tango", "cash", "batman"]
p names

# Update
# names.push("robin")
names << "robin"
p names

# names[3].capitalize!
names.last.capitalize!
p names

# Delete
names.delete_at(3)
names.delete("Robin")

p names


# Array Methods
names.sort!
p names

# for name in names
#   puts "Hello, #{name}!"
# end


# Iterator
names.each do |name|
  puts "Hello, #{name}!"
end

names.each_with_index do |name, index|
  puts "#{index + 1} - Hello, #{name}"
end