Insert a line for each n lines

ls -l | sed "$(while (( ++i < 5 )); do echo "N;"; done) a -- COMMIT --"
specially usefull for sql scripts with insert / update statements, to add a commit command after n statements executed.
Sample Output
X11R6
bin
doc
i686-pc-cygwin
i686-pc-mingw32
-- COMMIT --
include
lib
local
man
sbin
-- COMMIT --
share
src
ssl
tmp

2
2010-03-17 20:12:05

1 Alternatives + Submit Alt

What Others Think

Using a while loop makes it easily scalable and you could create a function that accepted n as an argument. To see what it's doing, here is the equivalent without the while: sed "N;N;N;N;N; a -- COMMIT --"
dennisw · 549 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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