From: Nelson Wong <Nelson@...>
Date: 2002-03-08T06:32:44+09:00
Subject: RE: Loading ruby file in irb


Thank you so much, Pete, it was a great help!

I tried the command "Ruby irb" and then "load" in MS command prompt, it
loads me the right files as long as the files are in the bin directory.
However, it would  notload the files, when I use RubyWin. I wonder where is
the default source code directory in RubyWin.

Thanks!!

Nelson

-----Original Message-----
From: Pete McBreen [mailto:pete@mcbreen.ab.ca]
Sent: Wednesday, March 06, 2002 7:37 PM
To: ruby-talk@ruby-lang.org
Subject: Re: Loading ruby file in irb


Nelson Wong <gogoneruson@hotmail.com> wrote

<< wonder how do I load Ruby files at irb on a fly?>>

D:\Ruby\bin>ruby irb
irb(main):001:0> load "OdometerTest.rb"
"012345"
"00100000"
true
irb(main):002:0> exit

require "OdometerTest.rb" would do a similar thing but it only loads a
file one, whereas load "file.rb" loads the file every time.

<<I wonder if it is possible to reload the same classes that has already
been loaded into irb, since I might try to keep modifying them.  >>

No problem, you can even dynamically add or redefine methods in classes.
It is perfectly legal (and very useful) to just give a partial definition
of a class at a irb prompt (and in ruby directly) to replace the
definition of just that method, or to add a new method...

class Odometer
  def increment
    @wheels.last.increment
  end
end

cheers, Pete
----
Pete McBreen, McBreen.Consulting , Cochrane, AB
email: petemcbreen@acm.org    http://www.mcbreen.ab.ca/

Author, "Software Craftsmanship The New Imperative"
Addison-Wesley (C) 2002
http://www.amazon.com/exec/obidos/ASIN/0201733862
Finalist for the 2002 Jolt Awards