On 17/11/2020 01:32 pm, Brian J. Murrell wrote:
It would be a useful enhancement to uniq to replace all lines
considered non-uniq (i.e. those that would be removed from the output)
with a message about how many times the previous line was repeated.
I.e.
$ cat <<EOF | uniq --replace-with-message '[previous line repeated %d times]'
first line
second line
repeated line
repeated line
repeated line
repeated line
repeated line
third line
EOF
first line
second line
repeated line
[previous line repeated 4 times]
third
line
Cheers,
b.
You could write your own function to do it. E.g.
unique() {
[ "$1" ] || { echo "Needs a readable file to test" && return 1; }
[ -r "$1" ] || { echo "Needs a readable file to test" && return 1; }
R=""; N=0
while IFS=$'\n' read L; do
[ "$L" = "$R" ] && { ((N++)); continue; }
[ "$N" -gt 0 ] && { echo "[Previous line repeated $N times]"; N=0; }
R="$L"
echo "$L"
done <$1
}
--
Chris Elvidge
