From: Robert Klemme <shortcutter@...>
Date: 2007-04-06T18:55:04+09:00
Subject: Re: the most useful code i've written in a while

On 06.04.2007 02:54, Trans wrote:
> 
> On Apr 5, 5:34 pm, "Ara.T.Howard" <ara.t.how...@noaa.gov> wrote:
>> harp:~ > cat errno
>> #! /usr/bin/env ruby
>> 256.times do |errno|
>>    puts "#{ errno } => #{ SystemCallError.new(errno).inspect }"
>> end
> 
> Nice.
> 
> Hmm... How about an inheritance tree too?

robert@fussel /cygdrive/c/Temp
$ ruby tr.rb > tree.txt

robert@fussel /cygdrive/c/Temp
$ wc -l tree.txt
897 tree.txt

robert@fussel /cygdrive/c/Temp
$ cat tr.rb
require 'pp'
ins = lambda {|h,k| h[k] = Hash.new(&ins)}
tree = Hash.new(&ins)
ObjectSpace.each_object(Class) {|cl| tree[cl.superclass][cl] = tree[cl]}
pp tree

robert@fussel /cygdrive/c/Temp
$ head -20 tree.txt
{Errno::ESPIPE=>{},
  Errno::ENOLINK=>{},
  Errno::EISCONN=>{},
  ThreadError=>{},
  Errno::ENOEXEC=>{},
  Errno::EL3HLT=>{},
  MatchData=>{},
  Errno::ELIBEXEC=>{},
  Errno::EMFILE=>{},
  Errno::ENETUNREACH=>{},
  StandardError=>
   {RangeError=>{FloatDomainError=>{}},
    ThreadError=>{},
    RegexpError=>{},
    NameError=>{NoMethodError=>{}},
    IOError=>{EOFError=>{}},
    RuntimeError=>{},
    SystemStackError=>{},
    TypeError=>{},
    SecurityError=>{},

robert@fussel /cygdrive/c/Temp
$

	robert