Re^2: Help constructing proper regex to extract values from filenames and concurrently opening those same files to access records

Thank you. This is great. Thanks a lot for breaking down that cryptic regex as well. I did try and test this, but had some issues with:

    # do extra check that $school is acceptable
    $school //= 'null'; # regex gives undef if not found
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Error msg:

Search pattern not terminated

I commented that out and it run, although it had these errors:

match: /home/test/abc/.date_run_dir
    type: abc
Use of uninitialized value in concatenation (.) or string at ./test7.p
+l line 31, <$_[...]> line 1.
    school: 
match: /home/test/def/.date_run_dir
    type: def
Use of uninitialized value in concatenation (.) or string at ./test7.p
+l line 31, <$_[...]> line 2.
    school:
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Also would you pls show me to extract values from the files I match? Can I do this in the same pass that I peform the regex? Example values from file (.date_run_dir, etc)

$ cat .date_run_dir .date_file_sent.*
/project/school/data/feed_abc_2010120816.ext3
mail_abc.dat.2010120816.ext3
mail_abc.dat.2010120816.ext3
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Re^3: Help constructing proper regex to extract values from filenames and concurrently opening those same files to access records by Anonymous Monk on Dec 11, 2010 at 22:10 UTC
Oh, sorry about that error. `//=` is only in Perl 5.10.0 and later, and I should have noted that. The statement is equivalent to `$school = 'null' unless defined $school;` For the values inside the listed files, you could use a similar regex (or build it and the original from another which contains the common parts of both) inside that inner while loop, yes?	[reply] [d/l] [select]
Re^4: Help constructing proper regex to extract values from filenames and concurrently opening those same files to access records by JaeDre619 (Acolyte) on Dec 12, 2010 at 00:07 UTC
I wouldn't need another regex inside the while loop. At this point, the regex you helped me with list all the files I need to read in at the same time extracting those particular keys I wanted. Now, since I'm already in I wouldn't need another regex. I just need to open the filenames and get the values. I hope I am making sense. Would I do this within the while loop of the of the if (DEBUG) section? UPDATE: Nevermind. Thanks for your help! This does what I need it to do. I haven't really used DEBUG before. Once I changed it to 1 it does what I need to do. This is a cool script. I can always use that debug technique. Thanks for showing me the ways.	[reply]