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perl equivalent of sed to select a range in file.

csnaruto
Novice

Mar 8, 2012, 5:42 PM

Post #1 of 3 (486 views)

perl equivalent of sed to select a range in file.	Can't Post

Hi All,

I'm looking for an equivalent perl code to work like the following sed command.

Quote

sed -n '/begin_pattern/,/end_pattern/p' $myfile

What I currently do in perl is to read the whole file into an array and loop through till I get the range from starting and ending pattern. It works but is very inefficient.

Anyone can help with the equivalent command?

Thanks.

FishMonger
Veteran

Mar 8, 2012, 6:05 PM

Post #2 of 3 (483 views)

Re: [csnaruto] perl equivalent of sed to select a range in file. [In reply to]	Can't Post

Reading in the file into an array and then loop over the array is almost always the wrong approach. Use a while loop to read it line-by-line and use the range operator to extract the section.

You can read up on the range operator in the perlop perldoc.
i.e., perldoc perlop
http://perldoc.perl.org/perlop.html#Range-Operators

csnaruto
Novice

Mar 8, 2012, 10:43 PM

Post #3 of 3 (475 views)

Re: [FishMonger] perl equivalent of sed to select a range in file. [In reply to]	Can't Post

Exactly what I'm looking for. Searching a wrong keyword earlier. Thanks.

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