I've been working on a way to parse a report file where there are several
hierarchies of data (say, company totals, regional totals, local totals) and
using a while read line loop with greps to identify the appropriate data. It
works, but it's *very* slow. Essentially it's in the form of
tac reportfile |
{
while read line; do
if [[ `echo $line | grep 'Company Total'` != "" ]]; then echo "$line"
fi
if [[ `echo $line | grep 'Regional Total'` !="" ]]; then echo "$line"
fi
if [[ `echo $line | grep 'Local Total'` != "" ]]; then echo "$line"
fi
done
}
The reason i do it this way is there are multiple of the lower totals and I
only want the last one in each. (there's logic for it but for simplicity I'm
not showing it here).
I know I could learn perl or python or something and do it faster than all
these subshells to grep, but I'm interested to know if there is a faster way to
do this in bash?
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