Multiple grep outputs appended to single row of CSV file
 

how to update a series of values from multiple grep commands outputs to be appended to a single row of a csv file?
Work on a linux envir. The values from grep output will be numeric values.

Output sold look like:

1,3,4,5,7,0,5


Each of these values will be odtained from multiple grep commands piped with wc -l

Is it possible to update a single row of a csv file if so pleas ehelp me with the command to be used to redirect the output into the csv file

Something like this?:
((grep a * | wc -l; grep b * | wc -l) | tr '\n' ','; echo) >> bash.rocks.csv

Just one minor improvement suggestion; use 'grep -c', save yourself
the invocation of 'wc'.

Cheers,
Tink

Hi Tinkster! In this very example (when greping files) your modification gives different results.
However, in general "grep -c" is in fact better, and should be preferred over "grep | wc -l".

My bad - still waking up ... it would work for individual files.
With the * it won't, as it doesn't do summaries. 'wc -l' is
indeed the way to go :}


Cheers,
Tink

Or we could use a single awk: