If the function is called with one argument, what Clojure language
rule allows x to appear outside the vector brackets?
On Jul 10, 7:18 pm, Jonathan Fischer Friberg <odysso...@gmail.com>
wrote:
> There's no interfaces, that's the function definition.
>
> define function max
> (defn max
>
> attach docstring
> "Returns the greatest of the nums."
>
> attach metadata
> {:added "1.0"}
>
> if max is called with one argument, use this function definition
> ([x] x)
>
> if max is called with two arguments, use this function definition
> ([x y] (if (> x y) x y))
>
> if max is called with more than two arguments, use this function definition
> ([x y & more]
> (reduce max (max x y) more)))
> ___________
>
> As you can see, y is introduced in one of the functions definitions.
> Also
> see:http://clojure.org/special_forms#Special%20Forms--(fn%20name?%20[params*%20]%20exprs*)<http://clojure.org/special_forms#Special%20Forms--%28fn%20name?%20[params*%20]%20exprs*%29>
> andhttp://clojure.org/metadata
>
> Jonathan
>
> On Sun, Jul 10, 2011 at 11:44 PM, octopusgrabbus
> <octopusgrab...@gmail.com>wrote:
>
> > For Question 1 this is an example of multiple interfaces. Got it.
>
> > On Jul 10, 5:42 pm, octopusgrabbus <octopusgrab...@gmail.com> wrote:
> > > From Clojure api for max
>
> > > (defn max
> > > "Returns the greatest of the nums."
> > > {:added "1.0"}
> > > ([x] x)
> > > ([x y] (if (> x y) x y))
> > > ([x y & more]
> > > (reduce max (max x y) more)))
>
> > > Question 1: Why can y be introduced as a local binding without a let?
>
> > > Question 2: What is the map {:added "1.0"} doing?
>
> > > Thanks.
> > > cmn
>
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