Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl-Sensitive Sunglasses
 
PerlMonks  

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'


Comment on Re: (cLive ;-)(Golf) Analyzing Time From tcpdump Output
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://143472]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (6)
As of 2015-07-03 00:06 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (47 votes), past polls