That is an excellent point, and the macro is actually a very nice
approach, thanks for the help.
On Apr 18, 1:07 am, Sean Corfield wrote:
> On Tue, Apr 17, 2012 at 9:16 PM, Dmitri wrote:
> > (map? foo bar baz) would return bar if foo is a map and baz otherwise.
>
> To elaborate on Alan's respon
On Tue, Apr 17, 2012 at 9:16 PM, Dmitri wrote:
> (map? foo bar baz) would return bar if foo is a map and baz otherwise.
To elaborate on Alan's response, consider:
(if (map? foo) (/ bar 0) baz)
If map? were 'merely' a variadic function, (map? foo (/ bar 0) baz)
would fail because (/ bar 0) would
IMO this is fairly absurd for a language default, but you can easily
do this yourself in a number of ways. For example:
(defmacro define-preds [& preds]
(cons `do
(for [pred preds]
`(defmacro ~(symbol (str pred "+")) ~'[obj then else]
(list '~'if (list '~pred ~'obj
