On 11/17/2016 11:12 AM, Pádraig Brady wrote: > Usually you'd want counts separately from each other > and separate from the data itself, in which case wc -l suffices: > > $ echo Lines in both = $(comm -12 file1 file2 | wc -l) > $ echo Lines only in 1st = $(comm -23 file1 file2 | wc -l) > $ echo Lines only in 2nd = $(comm -13 file1 file2 | wc -l) > > So this is in the efficiency/convenience category.
You mean to change the --total flag to accept an argument? $ echo Lines in both = $( comm -123 --total=3 file1 file2) $ echo Lines only in 1st = $(comm -123 --total=1 file1 file2) $ echo Lines only in 2nd = $(comm -123 --total=2 file1 file2) and $ echo Lines only in 1st or 2nd = $(comm -123 --total=1,2 file1 file2) ? Have a nice day, Berny
