From: Richard <RichardDummyMailbox58407@...>
Date: 2006-12-02T03:20:04+09:00
Subject: Re: Is there a simply way to get every method log itself before running?

Hi Phrogz,

There's nothing like having working code to really get one's head into
new software.  Thanks a lot for passing it along.  Looks great!

I have started play with Needles on
http://needle.rubyforge.org/chapter-1.html.  I got the first example
working ... only had to stick in a "requires" stmt.  I'm struggling
with the 2nd example.

I'll follow both approaches for a little while.

Best wishes,
Richard



Phrogz wrote:
> Richard wrote:
> > Thanks for pointing me to that kernel method.  I've got to study the
> > example(s) and construct a few of my own to apply it well.
>
> Here's my own example, since I've never played with it before:
>
> slim:~/Desktop gavinkistner$ ruby tmp.rb
> Hello, Bob
> Hello, Gavin
>
>
>
> slim:~/Desktop gavinkistner$ ruby -d tmp.rb
>
> Person#initialize called (line 3)
> <end Person#initialize>
>
> Person#initialize called (line 3)
> <end Person#initialize>
>
> Person#greet_first called (line 9)
> --Person#greet called (line 6)
> Hello, Bob
> --<end Person#greet>
> --Person#respond called (line 13)
> ----Person#greet called (line 6)
> Hello, Gavin
> ----<end Person#greet>
> --<end Person#respond>
> <end Person#greet_first>
>
> Object#recurse_down called (line 18)
> --Object#recurse_down called (line 18)
> ----Object#recurse_down called (line 18)
> ------Object#recurse_down called (line 18)
> --------Object#recurse_down called (line 18)
> ----------Object#recurse_down called (line 18)
> ------------Object#recurse_down called (line 18)
> ------------<end Object#recurse_down>
> ----------<end Object#recurse_down>
> --------<end Object#recurse_down>
> ------<end Object#recurse_down>
> ----<end Object#recurse_down>
> --<end Object#recurse_down>
> <end Object#recurse_down>
>
>
>
> slim:~/Desktop gavinkistner$ cat tmp.rb
> class Person
>   attr_reader :name
>   def initialize( name )
>     @name = name
>   end
>   def greet( someone )
>     puts "Hello, #{someone.name}"
>   end
>   def greet_first( someone )
>     greet( someone )
>     someone.respond( self ) # Social Obligation!
>   end
>   def respond( someone )
>     greet( someone )
>   end
> end
>
> def recurse_down( count=6 )
>   if count > 0
>     recurse_down( count-1 )
>   end
> end
>
> if $DEBUG
>   set_trace_func lambda{ |event, file, line, id, binding, classname|
>     $indent ||= 0
>
>     # Only deal with events that occur inside this file
>     return unless file == __FILE__
>
>     # Only deal with calls to my functions
>     case event
>       when 'call'
>         print $indent==0 ? "\n" : '--'*$indent
>         puts "#{classname}##{id} called (line #{line})"
>         $indent += 1
>
>       when 'return'
>         $indent -= 1
>         print "--" * $indent
>         puts "<end #{classname}##{id}>"
>
>     end
>   }
> end
>
> gk = Person.new( 'Gavin' )
> bk = Person.new( 'Bob' )
> gk.greet_first( bk )
> 
> recurse_down