On Dec 9, 2010, at 6:49 PM, [email protected] wrote:
> basename to eliminate one cut is a good point (I know about the command, but
> it's not something I commonly use), is it really any faster for this (since
> they both need to execute a command)
I don't know if it's much faster, but basename isn't handling any input like
cut would be doing. Everything it needs is handed to it as an argument.
> but what happens if the grep "^Filter:" returns more than one item? won't all
> of them become part of f?
The "exit" in the awk command takes care of it. It will exit after the first
print. And, in fact, since I'm using awk, my use of grep isn't really
required, either!
Taking everyone's suggestions into account, try this:
(eval `for m in *.meta; do f=\`awk '/^Filter:/ { print $2; exit }' $m\`; echo
-n "./$f -r \`basename $m .meta\` |"; done | sed -e "s/|$//"`) < input > output
The shell is cool.
-jan-
--
Jan L. Peterson
http://www.peterson-tech.com/~jlp/
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