.sh check for numeric content
fwd at bsd-solutions-duesseldorf.de
Thu Jun 24 11:50:37 UTC 2010
On Thu, Jun 24, 2010 at 11:58:05AM +0100, RW wrote:
> On Thu, 24 Jun 2010 05:19:53 +0200
> Thomas Keusch <fwd at bsd-solutions-duesseldorf.de> wrote:
> > tk at eternity:~$ b=5
> > tk at eternity:~$ case "$b" in
> > > [0-9] )
> > > echo numeric
> > > ;;
> > > * )
> > > echo alpha
> > > ;;
> > > esac
> > numeric
> > tk at eternity:~$
> > Works for me.
> Now try it with 10.
"10" is not valid input according to the problem/pseudocode (in the forum)
that the above code was posted as a solution for.
I tend to lend a hand, not the whole arm. If this doesn't solve the
problem 100% for the OP, it surely enables him to quickly spot a
solution (at least using the case statement) when he sees it, be it in
results from researching via google, or in actual system scripts
installed on his system.
"Give a man a fish, ..." and all that.
Don't get me wrong, I'm not at all against posting more complete solutions
for more complex problems, but I do indeed think that lending a hand while
still requiring a little thought and maybe tinkering on the side of the OP
is what ultimately enables him (& newcomers in general) to learn and grow.
Spoonfeeding solutions to trivial (and trivially researched questions)
is counterproductive on so many levels.
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