From: Tobias Reif <tobiasreif@...>
Date: 2002-07-09T04:09:46+09:00
Subject: Re: is there a better string.each?

Marcin 'Qrczak' Kowalczyk wrote:

> Mon, 8 Jul 2002 22:53:16 +0900, Albert Wagner <alwagner@tcac.net> pisze:
> 
> 
>>Why not just subclass it to do what you like?  Why change the
>>language? Use the language, Luke.
>>
>>class Chapters < String
>>	:
>>class Paragraphs < String
>>	:
>>
> Because they aren't differences between the data, but differences
> between ways of processing of a string. It doesn't make much sense
> for me to choose the iteration method when creating the string.


absolutely.

Perhaps

class Document < String
class Chapter  < String
class Section  < String
class Para     < String


p doc

# => [document,[[section,[para,para]], [section[para,para,para]]]]

Here's a prototype for s.th similiar I did a while ago:

-----
# structured abstract model representation for the lib

# utils: # # # # # # #
class String
   def lines
     split "\n"
   end
end
class Array
   def from_2
     self[1..-1]
   end
end

class Lib < Array
   def format
     map do |list|
       list.from_2.map do |item|
         item.join("\n")
       end
     end.join("\n\n")
   end
end

lib = Lib.new
readme = '#!usr/local/bin/ruby

# this file was automatically generated; and changes can get overwritten'
lib.push ['readme',readme.lines]

lib.push ['modules'],['classes']

class_ellipse = 'class Ellipse
   def cx
     5
   end
   def cx=
     7
   end
end'

class_rect = 'class Rect
   def x
     5
   end
   def x=
     7
   end
end'


module_id = 'module Id
   def id
     9
   end
   def id=
     3
   end
end'

[class_rect,class_ellipse].each do |class_code|
   lib.assoc('classes').push class_code.lines
end

#print all classes
#print lib.assoc('classes').from_2.join "\n"

# print class Ellipse
#print lib.assoc('classes').assoc('class Ellipse').join("\n")

lib.assoc('modules').push module_id.lines

# prints out nicely
open('generated_lib.tst','w') do |file|
  file.write lib.format
end
-----


Tobi

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