gistfile1.txt

sasha:rubinius2.0 brian$ irb
ruby-1.9.2-p180 :001 > def m
ruby-1.9.2-p180 :002?>   yield [1,2,3]
ruby-1.9.2-p180 :003?>   end
 => nil 
ruby-1.9.2-p180 :004 > m { |a, b| p a, b }
1
2
 => [1, 2] 
ruby-1.9.2-p180 :005 > m { |a| p a }
[1, 2, 3]
 => [1, 2, 3] 
ruby-1.9.2-p180 :006 > def n
ruby-1.9.2-p180 :007?>   yield 1, 2, 3
ruby-1.9.2-p180 :008?>   end
 => nil 
ruby-1.9.2-p180 :009 > n { |a| p a }
1
 => 1 
ruby-1.9.2-p180 :010 > l = ->(a,b) { p a, b }
 => #<Proc:0x000001009cfd50@(irb):10 (lambda)> 
ruby-1.9.2-p180 :011 > m(&l)
ArgumentError: wrong number of arguments (1 for 2)
	from (irb):10:in `block in irb_binding'
	from (irb):2:in `m'
	from (irb):11
	from /Users/brian/.rvm/rubies/ruby-1.9.2-p180/bin/irb:16:in `<main>'
ruby-1.9.2-p180 :012 > n(&l)
ArgumentError: wrong number of arguments (3 for 2)
	from (irb):10:in `block in irb_binding'
	from (irb):7:in `n'
	from (irb):12
	from /Users/brian/.rvm/rubies/ruby-1.9.2-p180/bin/irb:16:in `<main>'
ruby-1.9.2-p180 :013 >