For completeness sake...

Am Dienstag, 29. Januar 2013 10:31:18 UTC+1 schrieb lpetit:
>
> Rationale for b): you have an existing map, but the key may or may not 
> be present. Note that you can also use the version which returns 
> default value if there's no key in the map: (map key default-value) 
>

Also, "key" may be of arbitrary type. Not necessarily a keyword.

Meikel
 

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