Re^2: Two line match

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Re^3: Two line match by moritz (Cardinal) on Mar 10, 2008 at 15:25 UTC
The `-p` option enables line-by-line processing, so you have to change perls notion of a line: `perl -pe 'BEGIN { $/ = undef }; s/---\n---/---/g;'` [download]	[reply] [d/l] [select]
Re^4: Two line match by jrosenfeld (Initiate) on Mar 10, 2008 at 15:38 UTC
That works except that it only converts two lines of ----- into one. I wanted it to be able to convert any number of lines on ----- into 1 line of it. Shouldn't the /g do that? Jeff	[reply]
Re^5: Two line match by moritz (Cardinal) on Mar 10, 2008 at 15:43 UTC
The `/g` never handles overlapping matches in order to avoid infinite loops. But you can modifiy your regex: `m/----(?:\n----)+/----/g`	[reply] [d/l] [select]
Re^3: Two line match by grizzley (Chaplain) on Mar 10, 2008 at 16:12 UTC
use -0 to read whole file at once: `cat foo.txt \| perl -p0 -e 's/-----\n\n-----/------/g'` [download]	[reply] [d/l]
Re^4: Two line match by jrosenfeld (Initiate) on Mar 10, 2008 at 16:47 UTC
Thank you for the suggestion, but it only takes two lines and converts it into 1. I would like a one-liner to convert any number of lines of: ------ into one line of it. Jeff	[reply]
Re^5: Two line match by grizzley (Chaplain) on Mar 10, 2008 at 18:17 UTC
Understood. `perl -p0 -e 's/-----\n(\n\|-----\n)*-----\n/-----\n/g' file.txt` [download]	[reply] [d/l]