From: "David A. Black" <dblack@...>
Date: 2005-01-15T23:28:12+09:00
Subject: Re: Duck Typing and automated Conversions

Hi --

On Sat, 15 Jan 2005, itsme213 wrote:

>
> "David A. Black" <dblack@wobblini.net> wrote
>
>> How would you move this call to #join to a method signature?
>>
>>     def meth(a)
>>       puts a.join(", ")
>>     end
>>
>> I think there are only two ways:
>>
>>    1. put the whole thing, including the ", ", into the signature
>>       (which I doubt anyone would advocate);
>
> But you need no advocating to do, even today:
>    def meth (a, b = a.join(","))
>        b
>    end
>
> The only difference that 'b' is a variable with a default binding, which the
> caller can replace.
>
> True?

Yes -- a big difference, in my view.  Mainly I meant that there's is,
I think, probably not a lot of advocacy of putting arbitrarily much of
a method into its signature.  (Maybe I'm just old-fashioned though :-)


David

-- 
David A. Black
dblack@wobblini.net