Comments on: Word wrap: more adventures with sed http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/ Braindumps on things Mel Chua has found shiny lately. Sat, 11 Feb 2012 03:06:02 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Mel http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1260 Mel Thu, 13 Nov 2008 02:39:23 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1260 I just used fmt to format more IRC logs, and lo, it was gorgeous. Thanks, skierpage! I just used fmt to format more IRC logs, and lo, it was gorgeous. Thanks, skierpage!

]]> By: skierpage http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1155 skierpage Sun, 19 Oct 2008 04:09:50 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1155 I use vim for regular expressions. Despite introducing its own quirks it highlights matches, undo is easy, you can edit previous replacements, and its quirks aren't too bad. I marked the start and end of the transcript with ma and mb, from there on I operated on the range using :'a,'b followed by the substitution command. :'a,'bs/\n\(\n<mchua\)/\1/ this finds a newline followed by (a newline + <mchua). The parentheses make it remember the newline + mchua, so I can replace with \1. That gets rid of much whitespace. But it stuck too close together, so I undid it. I got your original version from history, and then :'a,'bs/^Oct 15 ..:..:.. \t// cleaned it all up, then I ran fmt --split-only Other vim stuff: xp deletes character under cursor then puts the deleted character back. So it fixes 'teh' J joins two lines, then x if necessary to get rid of the space at the join. is hard to read. Maybe I should have inserted at the end of each, so it appears as regular text. Thanks for transcribing! I use vim for regular expressions. Despite introducing its own quirks it highlights matches, undo is easy, you can edit previous replacements, and its quirks aren’t too bad.

I marked the start and end of the transcript with ma and mb, from there on I operated on the range using :’a,’b followed by the substitution command.

:’a,’bs/\n\(\n<mchua\)/\1/

this finds a newline followed by (a newline + <mchua). The parentheses make it remember the newline + mchua, so I can replace with \1. That gets rid of much whitespace. But it stuck too close together, so I undid it.

I got your original version from history, and then
:’a,’bs/^Oct 15 ..:..:.. \t//

cleaned it all up, then I ran fmt –split-only

Other vim stuff:

xp deletes character under cursor then puts the deleted character back. So it fixes ‘teh’

J joins two lines, then x if necessary to get rid of the space at the join.

is hard to read. Maybe I should have inserted at the end of each, so it appears as regular text.

Thanks for transcribing!

]]> By: skierpage http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1154 skierpage Sun, 19 Oct 2008 01:48:53 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1154 I think `fmt` will do what you want, much simpler. fmt --help I think `fmt` will do what you want, much simpler.

fmt –help

]]> By: L33tminion http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1146 L33tminion Thu, 16 Oct 2008 18:17:46 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1146 And just for kicks, here's a <a href="http://code.activestate.com/recipes/148061/" rel="nofollow">Python recipe</A> for the same thing. And just for kicks, here’s a Python recipe for the same thing.

]]> By: L33tminion http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1145 L33tminion Thu, 16 Oct 2008 18:16:08 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1145 <I>why doesn’t cat foo.txt | sed ’s/\(.\{1,80\}\)\( +|$\n?\)|\(.\{1,80\}\)/\1\3\n/g’ work?</I> <a href="http://www.delorie.com/gnu/docs/sed/sed_5.html" rel="nofollow">Apparently</A>, both + and ? must be escaped as \+ and \?. why doesn’t cat foo.txt | sed ’s/\(.\{1,80\}\)\( +|$\n?\)|\(.\{1,80\}\)/\1\3\n/g’ work?

Apparently, both + and ? must be escaped as \+ and \?.

]]> By: L33tminion http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/comment-page-1/#comment-1144 L33tminion Thu, 16 Oct 2008 17:52:31 +0000 http://blog.melchua.com/2008/10/15/word-wrap-more-adventures-with-sed/#comment-1144 If you want it to only break at word boundaries, wouldn't putting a space at the end of the first part of your match expression do that? <B>sed 's/\(.\{1,80\}\) /\1\n/g' foo.txt</B> If you want it to only break at word boundaries, wouldn’t putting a space at the end of the first part of your match expression do that?

sed ‘s/\(.\{1,80\}\) /\1\n/g’ foo.txt

]]>