From: Patrick Okui <pokui@...>
Date: 2009-09-24T08:07:06+09:00
Subject: Re: How do you limit the line length of the output commands? Where is 	pqueue library documented?

On 9/24/09 12:59 AM, Mason Kelsey wrote:
> First Question: What is an easy way to modify the below puts code to control
> line length without truncation?
>
> require "pqueue"
> pq=PQueue.new(proc{|x,y| x[0][0]<y[0][0]})
> puts pq.methods.join(', ')  # Displays the methods of PQueue Class
>
> I've a tried puts, print, and p and they never do a word wrap or such.  Is
> there a secret parameter for controlling the line length before word wrap
> occurs in these commands?

PP::pp has a width parameter, but in this case I think it'll print one 
method per line (not say 10 per line) if you did PP::pp pq.methods.

If that doesn't satisfy you I'd guess you're stuck with stuffing the 
methods into the end of a buffer yourself. (sorry this feels more like C 
than ruby to this ruby newbie but I can't think of a simpler way)

buffer = ''
pq.methods.each do |m|
   if buffer.split("\n")[-1].to_s.length + m.length < 60
     buffer << ((buffer.length > 0)? ", #{m}": "#{m}")
   else
     buffer << "\n#{m}"
   end
end

puts buffer

> Second question: The pqueue library is not documented in
> http://www.ruby-doc.org/stdlib/<http://www.ruby-doc.org/>.  Is there a
> reason for that?  Or is it cleverly hidden in a class that doesn't seem to
> have anything to do with priority queues?

I'm not sure how you got pqueue but in my case (to test this example) I 
had to install it as a gem i.e it's not distributed with my ruby (1.8.7).

gem query -d -n pqueue gives http://death.rubyforge.org/ as the homepage 
so that's where I'd start looking.

--
patrick