Text file editing - remove trailing comments?
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From: Eef Hartman on 3 Aug 2010 05:33 Mike Jones <luck(a)dasteem.invalid> wrote: > sed: -e expression #1, char 1: unknown command: `S' > > ...plus blank newfile Oops! Oops indeed, the second command should also have been a lower-case s (like the first). The difference is the " *" to catch spaces before the # mark. -- ****************************************************************** ** Eef Hartman, Delft University of Technology, dept. SSC/ICT ** ** e-mail: E.J.M.Hartman(a)tudelft.nl - phone: +31-15-27 82525 ** ******************************************************************
From: Loki Harfagr on 3 Aug 2010 05:33 Tue, 03 Aug 2010 09:20:38 +0000, Mike Jones did cat : > Responding to Mike Jones: > >> I have a long file with more lines than I fancy manually editing, and >> need to cut all the added comments from any lines that have them. >> >> ie: >> >> line1 >> line2 # comments >> line3 >> line4 # with notes >> line5 # more stuff >> >> ...becomes >> >> line1 >> line2 >> line3 >> line4 >> line5 >> >> Anybody got quick'n'simple technique for this kind of thing? >> >> >> > > sed 's/\([a-zA-Z0-9]*\)#.*/\1/g' -i file > > ...from J.O. Aho did the trick. > > Cheers guys! > > > > XP alt.os.linux,alt.os.linux.slackware FU alt.os.linux note that the 'g' is not necessary: $ sed -i 's/\([^#][^#]*\)#.*$/\1/' file now, as you wished a "quick'n'simple technique", a shorter form (rev logic) could be: $ sed -i 's/#[^#]*$//' file
From: Mike Jones on 3 Aug 2010 11:38 Responding to Loki Harfagr: > Tue, 03 Aug 2010 09:20:38 +0000, Mike Jones did cat : > >> Responding to Mike Jones: >> >>> I have a long file with more lines than I fancy manually editing, and >>> need to cut all the added comments from any lines that have them. >>> >>> ie: >>> >>> line1 >>> line2 # comments >>> line3 >>> line4 # with notes >>> line5 # more stuff >>> >>> ...becomes >>> >>> line1 >>> line2 >>> line3 >>> line4 >>> line5 >>> >>> Anybody got quick'n'simple technique for this kind of thing? >>> >>> >>> >>> >> sed 's/\([a-zA-Z0-9]*\)#.*/\1/g' -i file >> >> ...from J.O. Aho did the trick. >> >> Cheers guys! >> >> >> >> XP alt.os.linux,alt.os.linux.slackware FU alt.os.linux > > note that the 'g' is not necessary: > $ sed -i 's/\([^#][^#]*\)#.*$/\1/' file > > now, as you wished a "quick'n'simple technique", a shorter form (rev > logic) could be: > $ sed -i 's/#[^#]*$//' file I'll give it a test later. Cheers! -- *=( http://www.thedailymash.co.uk/ *=( For all your UK news needs.
From: Mike Jones on 3 Aug 2010 11:39 Responding to Eef Hartman: > Mike Jones <luck(a)dasteem.invalid> wrote: >> sed: -e expression #1, char 1: unknown command: `S' >> >> ...plus blank newfile Oops! > > Oops indeed, the second command should also have been a lower-case s > (like the first). The difference is the " *" to catch spaces before the > # mark. So, sed "s/ *#.*//" file > newfile ? -- *=( http://www.thedailymash.co.uk/ *=( For all your UK news needs.
From: Grant on 3 Aug 2010 17:37 On Tue, 3 Aug 2010 15:38:29 +0000 (UTC), Mike Jones <luck(a)dasteem.invalid> wrote: >Responding to Loki Harfagr: > >> Tue, 03 Aug 2010 09:20:38 +0000, Mike Jones did cat : >> >>> Responding to Mike Jones: >>> >>>> I have a long file with more lines than I fancy manually editing, and >>>> need to cut all the added comments from any lines that have them. >>>> >>>> ie: >>>> >>>> line1 >>>> line2 # comments >>>> line3 >>>> line4 # with notes >>>> line5 # more stuff >>>> >>>> ...becomes >>>> >>>> line1 >>>> line2 >>>> line3 >>>> line4 >>>> line5 >>>> >>>> Anybody got quick'n'simple technique for this kind of thing? >>>> >>>> >>>> >>>> >>> sed 's/\([a-zA-Z0-9]*\)#.*/\1/g' -i file >>> >>> ...from J.O. Aho did the trick. >>> >>> Cheers guys! >>> >>> >>> >>> XP alt.os.linux,alt.os.linux.slackware FU alt.os.linux >> >> note that the 'g' is not necessary: >> $ sed -i 's/\([^#][^#]*\)#.*$/\1/' file >> >> now, as you wished a "quick'n'simple technique", a shorter form (rev >> logic) could be: >> $ sed -i 's/#[^#]*$//' file > > >I'll give it a test later. Cheers! Gotta be careful when Loki plays golf. . . Fore! Grant.
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