Print a comma except on the last line in Awk

Question

I have the following script

awk \'{printf \"%s\", $1\"-\"$2\", \"}\' $a >> positions;

where $a stores the name of the fi

Answer 1

Here's a better way, without resorting to coreutils:

awk 'FNR==NR { c++; next } { ORS = (FNR==c ? "\n" : ", "); print $1, $2 }' OFS="-" file file