From: Adam Shelly <adam.shelly@...>
Date: 2006-08-29T02:11:43+09:00
Subject: Re: [Solution][QUIZ] DayRange (#92)

tOn 8/27/06, Boris Prinz <boris.prinz@gmail.com> wrote:
> my solution is definitely over-engineered :-)
>
On the opposite end, I've been thinking about codegolf too much.
Here's an update to my under-engineered solution, which meets all the
requirements in 3 statements.  It could be even shorter, but I wanted
to keep some possibility of someone else reading it.

class DayRange
  Dnames = [nil]+(1..7).map{|n|Time.gm(1,1,n).strftime("%a")}
  def initialize *l
    @range=l.map{|v|v.respond_to?(:split) ? v.split(',') :
v}.flatten.map{|v|(n=v.to_i)>0 ? n :
(1..7).find{|i|/#{Dnames[i]}/i=~v.to_s}||raise("ArgumentError:
#{v}")}.sort
  end
  def to_s
    @range.map{|e|"#{"-" if e-1==@l}#{Dnames[@l=e]}"}.join(',
').gsub(/(, -\w+)+, -/,'-').gsub(/ -/,' ')
  end
end

p DayRange.new( 1,3,4,5,6).to_s
p DayRange.new("Tuesday,Wednesday,Sunday").to_s
p DayRange.new(1,"tuesday,wed,5","6,7").to_s