calculator.rb

# Say hello to the user
# Prompt the user for a first number
# Get user input
# Prompt the user for a second number
# Get user input
# Prompt the user for an operator
# Run the appropraite calculation on the two numbers
# Print the result

puts "Welcome to the calculator app"

puts "First number:"
first_number = gets.chomp.to_i

puts "Second number:"
second_number = gets.chomp.to_i

puts "Operation:"
operation = gets.chomp

if operation == "+"
  result = first_number + second_number
elsif operation == "-"
  result = first_number - second_number
elsif operation == "/"
  result = first_number.fdiv(second_number)
elsif operation == "*"
  result = first_number * second_number
end
  
puts result

# Start until loop
# Ask for inputs and calculate
# Ask if the user would like to continue
# Stop the loop if they are done

puts "Welcome to the calculator app"

continue = nil

until continue == "n"

  # CODE FROM PREVIOUS SECTION

  puts "Would you like to continue [y/n]:"
  continue = gets.chomp
end

puts "Goodbye"

# Refactor calculating code into seperate method
# Inputs (arguments): first number, second number, and operation
# Output: number
# Place code in 'calculator.rb'
# Use `require_relative` at the top of 'interface.rb'
# Integrate this method into your interface code

def calculate(first_number, second_number, operation)
  if operation == "+"
    result = first_number + second_number
  elsif operation == "-"
    result = first_number - second_number
  elsif operation == "/"
    result = first_number.fdiv(second_number)
  elsif operation == "*"
    result = first_number * second_number
  end
  
  return result
end

horse_race.rb

# Define and store all the horses (array of strings)
# Loop over and print out all horse names
# Ask the user to bet on a horse
# Get user input
# Randomly pick a winning horse
# Tell the user if their horse won

horses = ["horse_1", "horse_2", "horse_3", "horse_4"]

horses.each do |horse|
  puts horse
end

puts "Place your bet"
user_bet = gets.chomp

winning_horse = horses.sample

puts "#{winning_horse} won!"

if winning_horse == user_bet
  puts "Congratulations"
else
  puts "You lost your bet"
end

# Start player off with a balance of money
# Print horses names
# Begin loop
# Ask for user bet
# Print results of race
# If the user lost substract from balance
# If the user won add to balance
# Print out the user's balance
# Ask the user if they would like to continue betting

horses = ["horse_1", "horse_2", "horse_3", "horse_4"]
balance = 100

horses.each do |horse|
  puts horse
end

continue = nil

until continue == "n"

  puts "Place your bet"
  user_bet = gets.chomp

  winning_horse = horses.sample

  puts "#{winning_horse} won!"

  if winning_horse == user_bet
    puts "Congratulations"
    balance += 50
  else
    puts "You lost your bet"
    balance -= 10
  end

  puts "Your balance is #{balance}"

  puts "Would you like to continue [y/n]:"
  continue = gets.chomp
end

instacart.rb

# Data:
# Represent the items on sale with a hash
# Item names as KEYS and thier prices as VALUES
# Represent the users cart as an array of item names STRINGS

# Welcome the user to the store
# Loop through all the items on sale and print out their name and price
# Start a loop
# Ask the user what they would like to buy
# If you have it, store it in thier cart
# Ask the user if they want to continue shopping
# Once they're done, loop through the user's cart and calculate the total price

store = {
  "kiwi" => 1.25,
  "banana" => 0.5,
  "mango" => 4,
  "asparagus" => 9
}

shopping_cart = []

puts "WELCOME!"

store.each do |item, price|
  puts "#{item}: #{price}"
end

user_choice = nil

until user_choice == "quit"
  puts "What would you like to buy? ('quit' to checkout)"
  user_choice = gets.chomp

  if store.key?(user_choice)
    shopping_cart << user_choice    
  end
end

total = 0

shopping_cart.each do |item|
  total += store[item]
end

puts "Total price is #{total}"

# When the user makes a choice, ask them how many items they would like
# Fill up the cart with that many items

store = {
  "kiwi" => 1.25,
  "banana" => 0.5,
  "mango" => 4,
  "asparagus" => 9
}

shopping_cart = []

puts "WELCOME!"

store.each do |item, price|
  puts "#{item}: #{price}"
end

user_choice = nil

until user_choice == "quit"
  puts "What would you like to buy? ('quit' to checkout)"
  user_choice = gets.chomp

  if store.key?(user_choice)
    puts "How many?"
    amount = gets.chomp.to_i

    amount.times do
      shopping_cart << user_choice
    end
  end
end

total = 0

shopping_cart.each do |item|
  total += store[item]
end

puts "Total price is #{total}"

# Modify the store data:
# Hash with item names (stings) as KEYS, and hashes as VALUES
# Those hashes will have to key/value pairs, one for price and the other for quantity

# Update existing code to respect this new format (printing loop & total price calculation)

# When the user enters their desired quantity only add to the card if there is enough quantity
# Update the hash to reflect the new quantity of that item

store = {
  "kiwi" => { "price" => 1.25, "quantity" => 10 },
  "banana" => { "price" => 0.5, "quantity" => 10 },
  "mango" => { "price" => 4, "quantity" => 10 },
  "asparagus" => { "price" => 9, "quantity" => 10 }
}

shopping_cart = []

puts "WELCOME!"

store.each do |item, details|
  price = details["price"]
  quantity = details["quantity"]
  puts "#{item}: #{price} (#{quantity} available)"
end

user_choice = nil

until user_choice == "quit"
  puts "What would you like to buy? ('quit' to checkout)"
  user_choice = gets.chomp

  if store.key?(user_choice)
    puts "How many?"
    amount = gets.chomp.to_i

    if store[user_choice]["quantity"] >= amount
      amount.times do
        shopping_cart << user_choice
      end

      store[user_choice]["quantity"] -= amount
    else
      puts "Sorry, there are only #{store[user_choice]["quantity"]} left"
    end
  end
end

total = 0

shopping_cart.each do |item|
  total += store[item]["price"]
end

puts "Total price is #{total}"