proc_vs_lambda.rb

def foo
  x = 42
  y = 1337
  
  p = Proc.new do
    return x
  end
  
  p.call
  
  y
end

foo # => 42

def bar
  x = 42
  y = 1337
  
  l = lambda do
    return x
  end
  
  l.call
  
  y
end

bar # => 1337