Would that be flow control though? I see this exception as a rather exceptional 
circumstance for this application...
On 20/03/2011, at 10:53 PM, Daniel Werner wrote:

> On Mar 20, 10:50 am, Andreas Kostler
> <[email protected]> wrote:
>> I would like to throw an exception when I'm trying to retrieve a value in a 
>> map for a key that doesn't exist.
> 
> Another concise solution (thanks, Conj Labs):
> 
> (defn get-o r-exc [map key]
>  (if-l et [[_ v] (find  map key)]
>    v
>    (thro w (Exce ption. "miss ing"))))
> 
> I'm not too fond of using exceptions for flow control, though.
> 
> Daniel
> 
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