Boy they really blew it when they invented -c,
(info "(grep) General Output Control")
‘-c’
‘--count’
Suppress normal output; instead print a count of matching lines for
each input file. With the ‘-v’ (‘--invert-match’) option, count
non-matching lines. (‘-c’ is specified by POSIX.)
Who in the world ever wants to know about the zero match counts (:0)? ;-)
OK, well then add some extra switch for the rest of us... or at least the INFO
page should mention how the pros filter them out.
#1
time find * -name \*.html | xargs grep -l staticmap | xargs grep -c staticmap |
head -n 3
location/directions/zaokeng.html:1
location/yaokeng_road.html:1
location/yaokeng_road2.html:1
real 0m0.015s
user 0m0.013s
sys 0m0.002s
#2
time find * -name \*.html | xargs grep -c staticmap | grep -v :0$ | head -n 3
comm/air/m750/trail.html:1
comm/air/m750/index.html:1
geo/house_numbering/taizhong/dongshi/index.html:1
real 0m0.017s
user 0m0.011s
sys 0m0.004s
(#1 is a big waste, but the real time is randomly a little shorter, as
it takes larger inputs so really see the difference.)
Anyway I've never ever wanted the :0s.
Wait! Maybe "-cl" or "-lc" will give us what we want!
Alas, they are just equivalent to "-l".
(As I suppose that fact is not documented, perhaps it could be given a
new (non-backwardly compatible, alas) definition...)
