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Re^3: get data from the database -CGI

by moritz (Cardinal)
on Nov 09, 2010 at 18:19 UTC ( #870371=note: print w/ replies, xml ) Need Help??


in reply to Re^2: get data from the database -CGI
in thread parsing a txt file

Why don't you just try it?

Perl 6 - links to (nearly) everything that is Perl 6.


Comment on Re^3: get data from the database -CGI
Re^4: get data from the database -CGI
by mjscott2702 (Pilgrim) on Nov 10, 2010 at 09:19 UTC
    Fair enough, so I did, using the following:
    while(<DATA>) { print if (/line1/ ... /line5/); } __DATA__ line1 line2 line3 line4 line5

    Outputs all the lines, including the start and end "markers". So, unless I am doing something wrong, I don't see how this is any different from the .. operator I have used in the past (at least under 5.8)?

    Reason I didn't just try it (which I should have anyway, admittedly) is that I thought myself and others would benefit from a little further explanation.

    Guess it's RTFM time for me...

      OK, from perlop:

      If you don't want it to test the right operand till the next evaluation, as in sed, just use three dots ("...") instead of two. In all other regards, "..." behaves just like ".." does.

      Not really sure what the difference is, so I'll stick with my normal two dot approach.

        This is the difference:
        $ yes | nl | perl -ne 'print if /00/../0/' | head -n20 100 y 200 y 300 y 400 y 500 y 600 y 700 y 800 y 900 y 1000 y 1001 y 1002 y 1003 y 1004 y 1005 y 1006 y 1007 y 1008 y 1009 y 1100 y $ yes | nl | perl -ne 'print if /00/.../0/' | head -n20 100 y 101 y 200 y 201 y 300 y 301 y 400 y 401 y 500 y 501 y 600 y 601 y 700 y 701 y 800 y 801 y 900 y 901 y 1000 y 1001 y

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