Ruby Fundamental - Procs e lambdas em Ruby

procs_lambdas_01.rb

my_proc = Proc.new { |x, y| x * y }

procs_lambdas_02.rb

def my_method(&block)
  block
end

my_proc = my_method { |x, y| x * y }
my_proc.class # => Proc

procs_lambdas_03.rb

my_lambda = lambda { |x, y| x * y }

procs_lambdas_04.rb

my_lambda = ->(x, y) { x * y }

procs_lambdas_05.rb

my_lambda = ->(x, y=2) { x * y }

procs_lambdas_06.rb

my_lambda = -> x, y=2 { x * y }

procs_lambdas_07.rb

addition = Proc.new { |x, y| x + y }
addition.call(3, 2) # => 5

subtraction = lambda { |x, y| x - y }
subtraction.call(3, 2) # => 1

multiplication = -> x, y { x * y }
multiplication.call(3, 2) # => 6

procs_lambdas_08.rb

addition = Proc.new { |x, y| x + y }
result = addition[10,20]

puts result # => 30

procs_lambdas_09.rb

addition = Proc.new { |x, y| x + y }
result = addition.(10, 20)

puts result # => 30