How to Implement grep –v in Perl
The UNIX grep command has a very useful argument, simply known as "-v", that can find all lines unless it has the following argument anywhere in each line. Here is an example of using this command:
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grep -v STRING FILENAME |
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So, if you had a file with these lines as its contents.
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ABCDEF GHI DOG JKL MNOP DG QR DOG ST UV XYZ |
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And you run this "grep -v DOG filename.txt" command, then the output would be this:
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ABCDEF MNOP DG QR XYZ |
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Well, you can do the same command in Perl with this single line of code:
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grep { $_ !~ /STRING/i } @RAY; |
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Go ahead and give it a try.
by Phil for Humanity
on 04/22/2010