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Re: (cLive ;-)(Golf) Analyzing Time From tcpdump Output

by chipmunk (Parson)
on Feb 05, 2002 at 16:00 UTC ( #143472=note: print w/ replies, xml ) Need Help??


in reply to (cLive ;-)(Golf) Analyzing Time From tcpdump Output
in thread (Golf) Analyzing Time From tcpdump Output

Yes, I am sure. I did run it, and it output the wrong answer:

-49.994325 -
It doesn't matter that \d+ is greedy, because .* is greedy and gets to go first. The .* only backtracks far enough to allow the \d+ to match. \d+ can match a single digit, so .* only gives up a single digit. But to get the correct answer, \d+ has to match two digits before the decimal point, not one.

On the other hand, it's okay if $2 only contains one digit before the decimal point, if $1 also contains a single digit before the decimal point: perl -lp0e'/(\d\.\d+).*(\d\.\d+)/s;$_=$2-$1'


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