From: Mason Kelsey <masonkelsey@...>
Date: 2009-09-24T11:07:16+09:00
Subject: Re: How do you limit the line length of the output commands? Where is 	pqueue library documented?

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No.  I haven't gotten around to learning GEMs yet or downloaded any special
libraries.  I'm just now becoming aware of the classes that come with1.8,
the version I down loaded two months ago.  Have not imported any Gems that I
am aware of.  Not ready for Ruby 1.9 yet.

I am running my Ruby code on SciTE, a free IDE that came with the download.
But that shouldn't be an issue here as what I want is a code way of
controlling the format of my display.  I just have to have the code in a
particular subdirectory in order for the retrieve to work.

I tried the code:
retrieve pp
pp pq.methods

and it produce the names of all of the methods for the priority queue, one
on each line.  Better than just one line but not good enough.

I did the same thing for
pp pp.methods
and got the methods of pp.  I noticed that many were shared by pq, making me
think that they inherited from a super class that they both must belong to.

I tried
pp(pq.methods, out=$>, width=60)
as was suggested in the Ruby standard documentation for pretty print.  But
that just gives me errors, prints out one method per line and the number 60
at the end.  I'm not going something right.

The code that Patrick suggested works best:
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

It is very interesting as it prints out five or six methods per line,
staying under 60 character length.  So it gives a much more readable
format. Still, Ruby needs a simple formatter for its display output class.
But at least I can stick this in a method and use it in the future.

Much thanks to everyone for all the useful knowledge, and special thanks to
Patrick for the extra mile.  Slowly but surely I am learning.

No Sam

On Wed, Sep 23, 2009 at 7:25 PM, David Masover <ninja@slaphack.com> wrote:

> On Wednesday 23 September 2009 04:59:23 pm Mason Kelsey wrote:
> > In the puts code
> > example below, I want to break between every 10 methods or just go to a
> new
> > line after every 60 characters that get displayed so they don't run off
> the
> > screen.
>
> It sounds like you're viewing your output in something wacky, like Notepad.
> Terminals usually wrap things, and so do good text editors -- they'll just
> wrap by character, not by word or method.
>
> I don't know that there's an "easy way" as in "built into the language",
> but
> there's probably a library to at least wrap on word. After all, it's not
> really a property of the IO itself, it's more string manipulation.
>
> > Is
> > there a secret parameter for controlling the line length before word wrap
> > occurs in these commands?
>
> Word wrap does not occur in these commands. If you're seeing word-wrapping
> at
> all, again, that's likely a text editor or a terminal doing it for you.
>
> If it's a terminal, I'm really not sure what you're complaining about --
> just
> resize the terminal window.
>
> > Second question: The pqueue library is not documented in
> > http://www.ruby-doc.org/stdlib/ <http://www.ruby-doc.org/>.
>
> Yeah, I have no idea where you got it from. I can't find it in my standard
> library for 1.8 or 1.9, or in
>
> Are you sure you didn't install a gem or something?
>
>

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