On 12/01/15 14:13, Jonathan David Amery wrote: > Package: coreutils > Version: 8.13-3.5 > Severity: normal > > I was attempting to use uniq to categorise my data based on the first so > many characters and I discover that: > > a) it is currently impossible to use uniq to output all lines; with lines > grouped by initial prefix ( -w N ) and separated by an empty line > (--all-repeated=separate) because there is no way to specify outputing > all lines > b) the combination behaviour of -u -d and -D is odd and suboptimal. > > Here is an example with a small example dataset: > > :; cat > uniq-test > AAA > AAB > ABA > ABC > ACA > ADA > ADD > ADE > :; uniq -w 2 -u uniq-test > ACA > :; uniq -w 2 -d uniq-test > AAA > ABA > ADA > :; uniq -w 2 -D uniq-test > AAA > AAB > ABA > ABC > ADA > ADD > ADE > :; uniq -w 2 -ud uniq-test > :; uniq -w 2 -du uniq-test > :; uniq -w 2 --all-repeated=separate uniq-test > AAA > AAB > > ABA > ABC > > ADA > ADD > ADE > :; uniq -w 2 -u --all-repeated=separate uniq-test > AAA > > ABA > > ADA > ADD > :; uniq -w 2 -c -D uniq-test > uniq: printing all duplicated lines and repeat counts is meaningless > Try `uniq --help' for more information. > :; > > So in summary: > > -ud or -du produces no output; but doesn't produce an error (where -c -D > does) > > -u -D produces unexpected output (all the repeated lines except the last one > for each set). > > There is no way to output all lines, with separations. > > There are a number of ways to address this issue; but I think the best one > would be to correct behavior and documentation such that: > > -u outputs any lines which are unique > -d outputs the first of any lines which are duplicated > -D outputs all lines which are duplicated > --all-repeated=METHOD seperates any groups of lines in the specified behavior > > Such that the output I wanted would be produced with: > > :; uniq -w 2 -u --all-repeated=separate uniq-test > AAA > AAB > > ABA > ABC > > ACA > > ADA > ADD > ADE > :; > > Thanks, > > J.
Upstream has gone with uniq --group since version 8.22 -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
