Re: Join lines



nickli2000@xxxxxxxxx wrote:

I have a file with a lot of lines with a singer number like the
following:

111
222
333
444
555
6666
77777
888
9999
..........

How could I join 3 lines at a time and with a "," in between and at
the beginning of the next line, as in the following:

111,222,333
,444,555,6666
,77777,888,9999
.........

$ echo "111
222
333
444
555
6666
77777
888
9999" | perl -lpe'$\ = eof() ? "\n" : $. % 3 ? "," : "\n,"'
111,222,333
,444,555,6666
,77777,888,9999



John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall
.



Relevant Pages