lambda.rb

def foo(lam, bar)
  lam.call
end

# hoge is japan's foobar - thanks @cwgem
bar = 'hoge'

# lambda retains the bindings from it's original declaration
el = lambda { puts bar*5 }
p = Proc.new { puts bar*5 }

#these all output the same thing
foo(lam, 'quid')
foo(lam, 5)
el.call

#and so do these ..
foo(p, 'quid')
foo(p, 5)
p.call