You're right. It could be anything. See my reference about including sample input/output data. - Robert
On Tue, Nov 15, 2016 at 11:08 AM, Don Buchholz <[email protected]> wrote: > Perhaps his file has strings, with slashes, other than dates? Pathnames > perhaps. > > On November 15, 2016 10:53:54 AM PST, Robert Citek <[email protected]> > wrote: >> >> On Tue, Nov 15, 2016 at 10:50 AM, Robert Citek <[email protected]> >> wrote: >>> >>> On Tue, Nov 15, 2016 at 10:30 AM, Rich Shepard >>> <[email protected]> wrote: >>>> >>>> Trying to change the date format from a forward slash (/) to a dash >>>> (-). >>>> There's a syntax error in my sed script: "file change-date-format.sed >>>> line >>>> 6: invalid reference \3 on `s' command's RHS" and I'm not seeing why. >>>> Here's >>>> the script: >>>> >>>> #!/usr/bin/sed >>>> # >>>> # Change date format from / to -. >>>> >>>> s/[0-9]\{4\}\/[0-9]\{2\}\/[0-9]\{2\}/\1-\2-\3/g >>>> >>>> Please show me what I've done incorrectly here. >>> >>> >>> Example input and sample expected data would be helpful. But if I >>> >>> were to guess (which is usually a really bad idea), your input date >>> string looks like this: >>> >>> 1996/03/10 >>> >>> and you want your output data to look like this: >>> >>> 1996-03-10 >>> >>> If that's correct (highly unlikely because I am guessing), then this >>> would work: >>> >>> $ <<< '1996/03/10' tr / - >>> 1996-03-10 >>> >>> But if you insist on sed: >>> >>> $ <<< '1996/03/10' sed -e 's#/#-#g' >>> 1996-03-10 >>> >>> Or insist on sed using groups: >>> >>> $ <<< '1996/03/10' sed -e >>> 's#\([0-9]\{4\}\)\/\([0-9]\{2\}\)\/\([0-9]\{2\}\)#\1-\2-\3#g' >>> 1996-03-10 >>> >>> or >>> >>> $ <<< '1996/03/10' sed -re >>> 's#([0-9]\{4\})\/([0-9]\{2\})\/([0-9]\{2\})#\1-\2-\3#g' >>> 1996/03/10 >> >> >> Oops! Corrected: >> >> $ <<< '1996/03/10' sed -re 's#([0-9]{4})/([0-9]{2})/([0-9]{2})#\1-\2-\3#g' >> 1996-03-10 >> >> This is why you want to KISS -- use tr, if >> possible. >> >> Regards, >> - Robert >> ________________________________ >> >> PLUG mailing list >> [email protected] >> http://lists.pdxlinux.org/mailman/listinfo/plug > > > -- > Sent from my Android device with K-9 Mail. Please excuse my brevity. _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
