Borrar todo

Parte de la sección Fundamentos del Journey de Ruby de Coddy. Lección 84 de 88.

Desafío

Fácil

Amplía tu rastreador de gastos añadiendo la funcionalidad «Borrar todo».

Tu programa debe:

Inicializar un array vacío llamado expenses
Crear un loop do que muestre el menú y lea la entrada del usuario
Cuando el usuario introduzca "1", solicitar el nombre y el importe del gasto, crear un hash con las claves :name y :amount, añadirlo al array expenses e imprimir Expense added!
Cuando el usuario introduzca "2", mostrar todos los gastos o un mensaje si no existe ninguno
Cuando el usuario introduzca "3", calcular y mostrar el total y el promedio de todos los gastos, o un mensaje si no existe ninguno
Cuando el usuario introduzca "4", borrar todos los gastos del array e imprimir un mensaje de confirmación
Cuando el usuario introduzca "5", imprimir Goodbye! y salir del bucle

El menú debe mostrarse exactamente como antes:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option:

Cuando se seleccione la opción "4", usa el método clear en el array de gastos e imprime: All expenses cleared!

Por ejemplo, si las entradas son 1, Coffee, 5.0, 4, 2 y después 5 (añadir un gasto, borrar todo y después consultar los gastos), la salida debe ser:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: All expenses cleared!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses recorded yet.

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

Si las entradas son 1, Lunch, 12.0, 1, Dinner, 25.0, 3, 4, 3 y después 5 (añadir dos gastos, consultar el total, borrar todo y consultar el total de nuevo), la salida debe ser:


--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Expense name: Amount: Expense added!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Total: $37.0
Average: $18.5

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: All expenses cleared!

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: No expenses to calculate.

--- Expense Tracker ---
1. Add Expense
2. View Expenses
3. Total & Average
4. Clear All
5. Exit
Choose an option: Goodbye!

Pruébalo tú mismo

expenses = []


loop do
  puts "--- Expense Tracker ---"
  puts "1. Add Expense"
  puts "2. View Expenses"
  puts "3. Total & Average"
  puts "4. Clear All"
  puts "5. Exit"
  print "Choose an option: "
  
  choice = gets.chomp
  
  if choice == "1"
    print "Expense name: "
    name = gets.chomp
    print "Amount: "
    amount = gets.chomp.to_f
    expense = { name: name, amount: amount }
    expenses << expense
    puts "Expense added!"
  elsif choice == "2"
    if expenses.empty?
      puts "No expenses recorded."
    else
      expenses.each do |expense|
        puts "#{expense[:name]}: $#{expense[:amount]}"
      end
    end
  elsif choice == "3"
    if expenses.empty?
      puts "No expenses to calculate."
    else
      total = 0
      expenses.each do |expense|
        total += expense[:amount]
      end
      average = total / expenses.length
      puts "Total: $#{total}"
      puts "Average: $#{average}"
    end
  elsif choice == "5"
    puts "Goodbye!"
    break
  end
  
  puts ""
end