From: Bill Kelly <billk@...>
Date: 2008-09-20T20:01:10+09:00
Subject: Re: [QUIZ] One-Liners Mashup (#177 again)


From: "Sebastian Hungerecker" <sepp2k@googlemail.com>
>
> James Gray wrote:
> > New puzzle: Provide a one-liner that can wrap a body of text at a 
> > requested maximum length.
> 
> Wasn't that a question in the old one liner quiz?
> Anyway (without looking it up):
> text.gsub(/.{1,80}/,"\\0\n")
> Or if you want to avoid breaking in the middle of words:
> text.gsub(/(.{1,80})\s+/, "\\1\n")
> (you'll have lines above 80 chars if there's a single word with
> more than 80 characters).

Indeed, I recall this from a previous ruby-talk thread... my
solution was like your 2nd one, above.... However, I seem to
recall someone had come up with an elegant regexp to actually
wrap words *on-or-before* the boundary.

(I remember being impressed.  Wish I could recall the
technique.  :)


> Next question:
> Sort an array of words by the words' values where a word's value is the
> sum of the values of its letters and a letter's value is its position in
> the alphabet. So the value of "Hello" is 8+5+12+12+15.

Here's my solution:

>> %w(abc abb aba).sort_by{|w| w.upcase.split(//).inject(0){|n,c| n+(c[0] - ?@)} }
=> ["aba", "abb", "abc"]


...I just refereshed my email, and I see that Holger Mack has 
beat me to a reply.  I didn't have a follow-up challenge ready,
so I'll just issue this meta challenge instead:

Look back over the set of one-liner challenges so far which
have gone unanswered and pick one.................

(As of this writing these include, Daniel Moore's "Print out a
Serpinski carpet"; James Gray's "Provide a one-liner that can
wrap a body of text at a requested maximum length." [assuming
strict requirements on maximum length], and, Holger Mack's
"Write a function per(n) which returns the periodicity of 1/n."


Regards,

Bill