From: ts <decoux@...>
Date: 2001-05-14T23:13:43+09:00
Subject: [ruby-talk:15097] Re: [Q] Rroc#arity ambiguity. Is it a bug?

>>>>> "L" == Leo  <slonika@yahoo.com> writes:

>> From the principle of least surprise I would expect that Proc.new{ |x| }.arity
L> returns +1 because it has one required argument and no optional arguments.

 Try this :

pigeon% ruby -e 'p (Proc.new{ |x,| }.arity)'
1
pigeon%

pigeon% ruby -e 'a = Proc.new {|x,| p x} ; a[1] ; a[1, 2]'
1
-e:1: wrong # of arguments (2 for 1) (ArgumentError)
        from -e:1:in `[]'
        from -e:1
pigeon%
 
pigeon% ruby -e 'a = Proc.new {|x| p x} ; a[1] ; a[1, 2]'
1
[1, 2]
pigeon% 



Guy Decoux