From: Vitor Peres <dodecaphonic@...>
Date: 2007-12-06T04:25:23+09:00
Subject: Re: Keeping variables across requires?

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On Dec 5, 2007 5:13 PM, Peter Bunyan <peter.bunyan@gmail.com> wrote:

> Ah, thanks. With Ruby I'm used to not having to do global/local things;
> I didn't know you could create global ones with $. But now I have
> another problem: The functions I created with lambda {} are now
> returning -1 as their arity.
>

AFAIK, that's a quirk in 1.8. Blocks with no arguments return -1 when you
ask them for their arity. That behavior was redefined in 1.9, and they now
return 0. You can also, currently, pass arguments to those blocks without
any indication that they'll be ignored.

1.8.6:

irb(main):001:0> lambda {}.arity
=> -1
irb(main):002:0> lambda {}.call 1
=> nil

1.9.0 (2007-11-28 patchlevel 0):

irb(main):001:0> lambda {}.arity
=> 0
irb(main):002:0> lambda {}.call 1
ArgumentError: wrong number of arguments (1 for 0)

-Vitor.

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