Shell Programming and Scripting

I have output from a file like this:

Code:

15,01,11,14:06
235

I would like to change this to:

Code:

15,01,11,14:06,235

Removing newline and change to ","
I now this can be done with tr
cat OUT | tr '\n' ',''

My problem is that tr is not implemented in this shell. sed is, show it should be possible using sed, but how?

---------- Post updated at 03:09 PM ---------- Previous update was at 02:27 PM ----------

After some more investigating, I did find this:

Code:

cat OUT | sed -n -e 'H;${x;s/\n/,/g;s/^,//;p;}'

It gives me desire result, but have no clue what it does

If you want all the lines joined up, like with the sed you showed, then simpler is:

Code:

$ paste -sd, file
15,01,11,14:06,235

Thanks, but paste is not implemented in this shell.

sed isn't implemented in the shell either. What do you mean by "shell"?

And what OS are you using?

I put your two lines of output into a file called OUT and joined them with sed:

Code:

sed 'N;s/\n/,/' OUT

Results in:

Code:

 
15,01,11,14:06,235

Thanks for feedback

Os is BusyBox v1.01

Ah, OK

Anyway, you have the sed you need, so that's good!

You have cat on BusyBox, which is also good, but you don't need it here:

Code:

sed -n -e 'H;${x;s/\n/,/g;s/^,//;p;}' OUT

As you asked, the sed appends every line from the file it's reading to the "hold space" (H), and on the last line ($) swaps it with the "pattern space" (x), and then, since the entire file is effectively in the pattern space, can go about replacing all the newlines with commas (s/\n/,/g). Finally it tidies up the leading comma (s/^,//) left by H before printing the whole lot (p), that was initially prevented by the -n option.