I'm not so sure about your checker:

$ ./two_digit_combo.pl | perl -ne 'print join " ", sort unpack("A2" x 
+(length()/2), $_)'
00 01 02 03 04 05 06 07 08 09 11 12 13 14 15 16 17 18 19 22 23 24 25 2
+6 27 28 29 33 34 35 36 37 38 39 44 45 46 47 48 49 55 56 57 58 59 66 6
+7 68 69 77 78 79 88 89 99

$ cat two_digit_combo.pl                        
#!/usr/local/bin/perl

for('00'..'99'){$h{$_}++if(!($h{$_}||$h{reverse$_}))}print keys%h

$

[download]

Clearly, '00' is right at the beginning of the output.

----
I wanted to explore how Perl's closures can be manipulated, and ended up creating an object system by accident.
-- Schemer

Note: All code is untested, unless otherwise stated

In reply to Re: Re2: Friday Golf: All 2-digit combinations by hardburn
in thread Friday Golf: All 2-digit combinations by PhilHibbs

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