From: Austin Ziegler <austin@...>
Date: 2002-06-22T08:17:21+09:00
Subject: Re: Looking for the Ruby way for the following

On Sat, 22 Jun 2002 06:52:05 +0900, David Alan Black wrote:
> On Sat, 22 Jun 2002, Austin Ziegler wrote:
>> On Sat, 22 Jun 2002 06:17:25 +0900, Bil Kleb wrote:
>>> Currently I am using the following rather ugly bit of Ruby code
>>> to calculate the maximum length of the file names strings (plus
>>> one) in the array file_list,
>>> 
>>> fn_width = 0
>>> file_list.each{ |fn| fn_width = [File.basename(fn).size,
>>> fn_width].max }
>>> fn_width += 1
>>> 
>>> Can someone offer a more elegant method? My brain seems to have
>>> shutdown on this problem today...
>> Why not use #inject()? It seems like it would be the natural
>> choice in this case.
> I confess I am #inject-ly challenged. Can you show how this would
> be done?

I believe that it would be something like (adapted from the Pickaxe
book):

file_list.inject(0) do
   |fn_width, fn| fn_width = [File.basename(fn).size, fn_width].max
end
fn_width += 1;

I suspect that the map solution you provided earlier is cleaner, and
you may need to do the appropriate #inject() mixin (p102 of the
Pickaxe book) if you don't have 1.7 (I think that's when #inject()
was added).

-austin
-- Austin Ziegler, austin@halostatue.ca on 2002.06.21 at 19.08.37