2010/9/11 "Paweł Hajdan, Jr." <phajdan...@gentoo.org>
> On 9/11/10 11:03 AM, Jonathan Callen wrote:
> > Just as a proof-of-concept, here's one implementation of such a
> > function, allowing for an arbitrary number of arguments:
> >
> > use_echo() {
> > while [[ $# -gt 1 ]]; do
> > if use "$1"; then
> > echo "$2"
> > return
> > fi
> > shift 2
> > done
> > [[ $# -eq 1 ]] && echo "$1"
> > }
>
> Looks good to me. If it doesn't get included in any eclass, I will just
> paste it to the chromium ebuilds. :)
>
> Paweł
>
> I don't count but sometimes I do still read ebuilds, the function proposed
look a bit^W unreadable to me,
may I suggest to aggregate use and echo, separating them with a comma ",".
The first element with an empty "use" always echo and return.
See implementation and example below
use_case() {
local u
local c
while [[ $# -gt 0 ]]
do
u=${1%%,*}
c=${1#*,}
if [[ ${u} == "" ]] || use $u
then
echo ${c}
break
fi
shift
done
}
echo $(use_case useA,echoA useB,echoB ,echoC)
