Re: remove newlines from a file
[Agghh. To list this time] On Tuesday 01 September 2009 20:03:19 Paul Schmehl wrote: > I found a sed tutorial once that did this, but I can't seem to find it > again. I have a file with multiple lines, each of which contains a single > ip followed by a /32 and a comma. I want to combine all those lines into a > single line by removing all the newline characters at the end of each line. > > What's the best/most efficient way of doing that in a shell? I'd use rs(1). http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
Warren Block wrote: > On Tue, 1 Sep 2009, Steve Bertrand wrote: >> George Davidovich wrote: >>> On Tue, Sep 01, 2009 at 06:03:19PM +, Paul Schmehl wrote: I found a sed tutorial once that did this, but I can't seem to find it again. >>> >>> You're probably thinking of "Useful One-Line Scripts for Sed": >>> >>> http://sed.sourceforge.net/sed1line.txt >>> >>> A good follow-up: >>> >>> http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained >>> I have a file with multiple lines, each of which contains a single ip followed by a /32 and a comma. I want to combine all those lines into a single line by removing all the newline characters at the end of each line. What's the best/most efficient way of doing that in a shell? >>> >>> A sed solution would be >>> >>> sed -e :a -e '$!N; s/\n/ /; ta' my_file >>> >>> Other (easier to remember) solutions could include: >>> >>> tr -d '\n' < my_file >>> tr '\n' ' ' < my_file >>> >>> echo $(cat my_file) # not so useless use of cat! >>> >>> paste -s my_file >>> >>> while read line; do >>> joined="$joined $(echo $line)" >>> done < my_file >>> echo $joined >>> >>> Lots of options, of course. Even more with Perl. >> >> Yeah, how 'bout Perl: >> >> % perl -ne 's/\n/ /g; print;' < tests/ips.txt > > perl -pe 'chomp' myfile > > is somewhat easier. Nce golf... > Works with Ruby, too. Is Ruby Perl? ;) Steve smime.p7s Description: S/MIME Cryptographic Signature
Re: remove newlines from a file
On Tue, 1 Sep 2009, Steve Bertrand wrote: George Davidovich wrote: On Tue, Sep 01, 2009 at 06:03:19PM +, Paul Schmehl wrote: I found a sed tutorial once that did this, but I can't seem to find it again. You're probably thinking of "Useful One-Line Scripts for Sed": http://sed.sourceforge.net/sed1line.txt A good follow-up: http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained I have a file with multiple lines, each of which contains a single ip followed by a /32 and a comma. I want to combine all those lines into a single line by removing all the newline characters at the end of each line. What's the best/most efficient way of doing that in a shell? A sed solution would be sed -e :a -e '$!N; s/\n/ /; ta' my_file Other (easier to remember) solutions could include: tr -d '\n' < my_file tr '\n' ' ' < my_file echo $(cat my_file) # not so useless use of cat! paste -s my_file while read line; do joined="$joined $(echo $line)" done < my_file echo $joined Lots of options, of course. Even more with Perl. Yeah, how 'bout Perl: % perl -ne 's/\n/ /g; print;' < tests/ips.txt perl -pe 'chomp' myfile is somewhat easier. Works with Ruby, too. -Warren Block * Rapid City, South Dakota USA ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
George Davidovich wrote: > On Tue, Sep 01, 2009 at 06:03:19PM +, Paul Schmehl wrote: >> I found a sed tutorial once that did this, but I can't seem to find it >> again. > > You're probably thinking of "Useful One-Line Scripts for Sed": > > http://sed.sourceforge.net/sed1line.txt > > A good follow-up: > > http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained > >> I have a file with multiple lines, each of which contains a single ip >> followed by a /32 and a comma. I want to combine all those lines into >> a single line by removing all the newline characters at the end of >> each line. >> >> What's the best/most efficient way of doing that in a shell? > > A sed solution would be > > sed -e :a -e '$!N; s/\n/ /; ta' my_file > > Other (easier to remember) solutions could include: > > tr -d '\n' < my_file > tr '\n' ' ' < my_file > > echo $(cat my_file) # not so useless use of cat! > > paste -s my_file > > while read line; do > joined="$joined $(echo $line)" > done < my_file > echo $joined > > Lots of options, of course. Even more with Perl. Yeah, how 'bout Perl: % perl -ne 's/\n/ /g; print;' < tests/ips.txt :) Steve smime.p7s Description: S/MIME Cryptographic Signature
Re: remove newlines from a file
On Tue, Sep 01, 2009 at 06:03:19PM +, Paul Schmehl wrote: > I found a sed tutorial once that did this, but I can't seem to find it > again. You're probably thinking of "Useful One-Line Scripts for Sed": http://sed.sourceforge.net/sed1line.txt A good follow-up: http://www.osnews.com/story/21004/Awk_and_Sed_One-Liners_Explained > I have a file with multiple lines, each of which contains a single ip > followed by a /32 and a comma. I want to combine all those lines into > a single line by removing all the newline characters at the end of > each line. > > What's the best/most efficient way of doing that in a shell? A sed solution would be sed -e :a -e '$!N; s/\n/ /; ta' my_file Other (easier to remember) solutions could include: tr -d '\n' < my_file tr '\n' ' ' < my_file echo $(cat my_file) # not so useless use of cat! paste -s my_file while read line; do joined="$joined $(echo $line)" done < my_file echo $joined Lots of options, of course. Even more with Perl. -- George ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
On Tue, Sep 01, 2009 at 06:03:19PM +, Paul Schmehl wrote: > I found a sed tutorial once that did this, but I can't seem to find it > again. I have a file with multiple lines, each of which contains a single > ip followed by a /32 and a comma. I want to combine all those lines into a > single line by removing all the newline characters at the end of each line. > > What's the best/most efficient way of doing that in a shell? Use tr(1) something like tr -d "[\n]" < inputfile > outputfile jerry > > -- > Paul Schmehl, Senior Infosec Analyst > As if it wasn't already obvious, my opinions > are my own and not those of my employer. > *** > "It is as useless to argue with those who have > renounced the use of reason as to administer > medication to the dead." Thomas Jefferson > > ___ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org" ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
--On Tuesday, September 01, 2009 13:55:37 -0500 Mak Kolybabi wrote: On 2009-09-01 18:03, Paul Schmehl wrote: I found a sed tutorial once that did this, but I can't seem to find it again. I have a file with multiple lines, each of which contains a single ip followed by a /32 and a comma. I want to combine all those lines into a single line by removing all the newline characters at the end of each line. What's the best/most efficient way of doing that in a shell? Personally, I'd use: % tr -d '\n' < inputfile Personally, I like your solution. :-) -- Paul Schmehl, Senior Infosec Analyst As if it wasn't already obvious, my opinions are my own and not those of my employer. *** "It is as useless to argue with those who have renounced the use of reason as to administer medication to the dead." Thomas Jefferson ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
Hi, Am Dienstag, 01. Sep 2009, 18:03:19 + schrieb Paul Schmehl: > I found a sed tutorial once that did this, but I can't seem to find it > again. I have a file with multiple lines, each of which contains a single > ip followed by a /32 and a comma. I want to combine all those lines into a > single line by removing all the newline characters at the end of each line. > > What's the best/most efficient way of doing that in a shell? Probably this: $ echo `cat ip-file` $ ipline=`cat ip-file` $ echo $ipline | wc -l Bertram -- Bertram Scharpf Stuttgart, Deutschland/Germany http://www.bertram-scharpf.de ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
On 09/01/2009 03:03 PM, Paul Schmehl wrote: I found a sed tutorial once that did this, but I can't seem to find it again. I have a file with multiple lines, each of which contains a single ip followed by a /32 and a comma. I want to combine all those lines into a single line by removing all the newline characters at the end of each line. What's the best/most efficient way of doing that in a shell? A simple solution could be using tr command tr -d '\012' < file > output_file ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
Paul Schmehl wrote: >I found a sed tutorial once that did this, but I can't seem to find it again. >I have a file with multiple lines, each of which contains a single ip followed >by a /32 and a comma. I want to combine all those lines into a single line by >removing all the newline characters at the end of each line. > >What's the best/most efficient way of doing that in a shell? paste(1)? b. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
Re: remove newlines from a file
On 2009-09-01 18:03, Paul Schmehl wrote: > I found a sed tutorial once that did this, but I can't seem to find it > again. I have a file with multiple lines, each of which contains a single > ip followed by a /32 and a comma. I want to combine all those lines into a > single line by removing all the newline characters at the end of each line. > > What's the best/most efficient way of doing that in a shell? Personally, I'd use: % tr -d '\n' < inputfile -- Matthew Anthony Kolybabi (Mak) () ASCII Ribbon Campaign | Against HTML e-mail /\ www.asciiribbon.org | Against proprietary extensions ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
remove newlines from a file
I found a sed tutorial once that did this, but I can't seem to find it again. I have a file with multiple lines, each of which contains a single ip followed by a /32 and a comma. I want to combine all those lines into a single line by removing all the newline characters at the end of each line. What's the best/most efficient way of doing that in a shell? -- Paul Schmehl, Senior Infosec Analyst As if it wasn't already obvious, my opinions are my own and not those of my employer. *** "It is as useless to argue with those who have renounced the use of reason as to administer medication to the dead." Thomas Jefferson ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"
