You could spice things a bit up:
(defn extend-to
[protocol & class-impl-mappings]
(doseq [[class impl] (partition 2 class-impl-mappings)]
(extend class protocol impl)))
(extend-to PThree
Long {:hello long-hello}
Integer {:hello long-hello}
Number {:hello number-hello})
Meikel
2013/8/2 Phillip Lord <phillip.l...@newcastle.ac.uk>
> "Meikel Brandmeyer (kotarak)" <m...@kotka.de> writes:
> >> Sure, I understand why it's not working! I just don't know how to fix
> it.
> >>
> >>
> > Plain old functions:
> >
> > (defn number-hello
> > [n]
> > (when (= n 10)
> > "hello"))
> >
> > (defn long-hello
> > [n]
> > (if (= n 5)
> > "goodbye"
> > (number-hello n)))
> >
> > (extend Number
> > PThree
> > {:hello number-hello})
> >
> > (extend Long
> > PThree
> > {:hello long-hello})
> >
> > (extend Integer
> > PThree
> > {:hello long-hello})
> >
> > HTH.
>
> It does, and appears to be the only way to go.
>
> Phil
>
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