Anonymous Monk,

Thank you for this. I did as you kindly suggested and here is what happened: 

mrh@workstationmachine:~$ BEGIN { $/ = "\n"; $\ = "\n"; }
bash: syntax error near unexpected token `}'
mrh@workstationmachine:~$ ;
bash: syntax error near unexpected token `;'
mrh@workstationmachine:~$ (%h) = (), undef @h{split(//, $_, 0)}, keys 
+%h == 3 and print $_ forea
bash: syntax error near unexpected token `='
mrh@workstationmachine:~$ +ch ('0000' .. '9999');
bash: syntax error near unexpected token `'0000''
mrh@workstationmachine:~$ -e syntax OK
bash: -e: command not found

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In reply to Re^5: Find duplicate digits by mroman
in thread Find duplicate digits by Anonymous Monk

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