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Re: regex needed

by MZSanford (Curate)
on Jan 30, 2003 at 18:17 UTC ( #231399=note: print w/replies, xml ) Need Help??


in reply to regex needed

You have the matcing correct, but you did not save any of the data you matched. You may want to take a look at the perlre man page, in praticular what parenthesis are for. Something like the follwing (untested) code :
while (<DATA>) { if ($_ =~ /^(\d+\s+\[\d+\.\d+\.\d+\.\d+\]\s+[\d+\.\d+\.\d+\.\d+\]) +/) { print "Match=$1\n"; } }

The addition of getting the field is an excersize left to the reader.


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[stevieb]: james28909: what's the problem/question?
[james28909]: it is not an absolute date like "27" or "31". sometimes it is like wednesday or friday
[james28909]: and i need to format those special instances into an absolute date instead of "yesterday"
[stevieb]: ask a question on SoPW, and include at least a half-dozen examples of the input, and at least one example of expected output
[davido]: Exactly: SoPW. This isn't going to be solved easily in the CB.
[james28909]: in need "yesterday" and so on, to be absolute like "1" or "31"
[stevieb]: ...and throw some of your existing code into the equation as well, just so readers know you've given a try at it ;)
[james28909]: ok
[stevieb]: davido thanks for the link ;) I was being the typical lazy
[davido]: date parsing is hard. The more examples you can provide of the input (within reason) and expected output, the better.

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