Re: the most useful code i've written in a while

On 4/6/07, Robert Klemme <shortcutter@xxxxxxxxxxxxxx> wrote:
On 06.04.2007 02:54, Trans wrote:
>
> On Apr 5, 5:34 pm, "Ara.T.Howard" <ara.t.how...@xxxxxxxx> 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

Nice! Small refinement for tree of Exceptions:

tree[cl.superclass][cl] = tree[cl] if cl <= Exception

Regards,
Sean

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