sirramongabriel

when 'display'
  movies.each do |movie, rating|
    puts "#{movie}: #{rating}"
  end

sirramongabriel

when 'delete'
  puts "What movie do you want to delete?"
  title = gets.chomp
  if movies[title.to_sym].nil?
    puts "Movie not found!"
  else
    movies.delete(title.to_sym)
    puts "#{title} has been removed."
  end
else

sirramongabriel

# creating a proc inside a method
def my_first_proc
  Proc.new
end

# creating a proc assigned to a variable
my_second_proc = Proc.new { |val| puts "#{val}" }

sirramongabriel

def my_first_proc
  Proc.new
end
proc = my_first_proc { "hello" }
proc.call  

sirramongabriel

# show only even numbers in an array

numbers = [1,2,3,4,5,6,7,8,9,10,11]

doubled_fibs = fibs.collect { |fib_num| fib_num * 2 }

even_numbers = numbers.collect do |num|
  if num % 2 == 0 
    puts num
  end

sirramongabriel

# allow our method to accept a block
def block_test
  puts "I'm in the method!"
  puts "Yielding to the block..."
  yield
  puts "I'm back in the method!"
end

block_test { puts "--- And splish splash... I'm the block!" }

sirramongabriel

def yield_name(name)
  puts "I'm in the method!"
  yield name
  puts "Block complete! Back in the method."
end

yield_name("Ramon") { |name| puts "My first name is #{name}." }

sirramongabriel

# lambda
lambda { |x| x.to_f * 0.0314 }

# Proc
Proc.new { |x| x.to_f * 0.0314 }

sirramongabriel

lam - lambda { |x| p x }
# => <Proc:0n79er3l@(irb) :7 (lambda)>

# call with the 'x' paramerter
lam.call(1)
# => 1

# call without the 'x' parameter
lam.call
# => ArgumentError: wrong number of arguments (0 for 1)

sirramongabriel

class Automobile
  # A mixture of automobile features go here.
end