As for your actual question, the .* matches as much as it can, which is "12345\t", since \W matches "\n".

The simples solution is probably s/^(\w*)\b/$1/, unless your goal is to remove trailing white spaces. In that case, it would be s/\s+$//.

In reply to Re: Converting decimal value to hex by ikegami
in thread Converting decimal value to hex by coldmiser

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