Fernan2

user.phone_1 = '963112233'
user.phone_4 = '666111000'
user.phone_2 = '678111000'

phones = (1..4).map do |i|
  user.send("phone_#{i}")
end

=> ['963112233', '678111000', nil, '666111000']

Fernan2

{
  nil => "No se encuentra",
  'A' => "Opción A",
  'X' => AMOUNT * RATE
}

ORDER_TO_BD = {
  'cheap' => 'price',
  'expensive' => 'price DESC',
  'popular' => 'likes_count DESC'

Fernan2

validates :name, presence: true

def my_method

item.method

if subscriber&.valid?

workdays = %w(lun mar mie jue vie)

Fernan2

validates(:name, { presence: true })

def my_method()

item.method()

if subscriber && subscriber.valid?
  
workdays = ["lun", "mar", "mie", "jue", "vie"]

Fernan2

for i in 0..(subscribers.length - 1)
  subscribers[i].notify
end

for suscriber in subscribers
  subscriber.notify
end

suscribers.each do |subscriber|
  subscriber.notify

Fernan2

class Prestamo < ActiveRecord::Base
  enum finalidad: {
    reunificar: 'Reunificar deudas',
    estudios: 'Estudios',
    imprevistos: 'Imprevistos',
    compra_vehiculo: 'Compra de vehículo',
    viaje: 'Viaje',
    reformas: 'Reformas hogar',
    otros: 'Otros'
  }

Fernan2

Prestamo.estudios.count
@prestamo.estudios!
@prestamo.estudios?

Fernan2

Prestamo.where(finalidad: 'Estudios').count
@prestamo.update_attribute(:finalidad, 'Estudios')
@prestamo.finalidad == 'Estudios'

Fernan2

class AddFinalidadToPrestamos < ActiveRecord::Migration
  def change
    add_column :prestamos, :finalidad, :finalidad_prestamo
  end
end

Fernan2

class CreatePrestamos < ActiveRecord::Migration
  def change
    create_table :prestamos do |t|
      ...
      t.column :finalidad, :finalidad_prestamo
      ...
    end
  end
end