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Re: doing a search and replace on a large file

by b10m (Vicar)
on Apr 14, 2004 at 12:48 UTC ( #345029=note: print w/replies, xml ) Need Help??


in reply to Re: doing a search and replace on a large file
in thread doing a search and replace on a large file

Minor tweak: since the OP wants to "delete" lines that do not match a certain pattern, I'd change the unless into an if. That way, you "save" the lines that do match the pattern ;-)

open IN, "<$bigfile" or die "Can't open $bigfile: $!\n"; open OUT, ">$newfile" or die "Can't open $newfile: $!\n"; while(<IN>) { print OUT $_ if /the pattern in question/; } close OUT; close IN;
--
b10m

All code is usually tested, but rarely trusted.

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