Hilarious - I am so conditioned already to have everything in a list :)
Thanks for your patient explanation. Merry xmas.
ray
Ray
On Sunday 16 December 2012 at 22:20, Benjamin R. Haskell wrote:
> On Sun, 16 Dec 2012, mond wrote:
>
> > One small thing Ben... when I try to use the final formulation I receive an
> > error:
> > (def joined-products (map product-with-item products))
> >
> > user=> (joined-products)
> > ClassCastException clojure.lang.LazySeq cannot be cast to clojure.lang.IFn
> > user/eval241 (NO_SOURCE_FILE:9)
> >
> > Any ideas?
>
> To evaluate a list, Clojure tries to call the first element as a
> function, with the remaining elements as its arguments. So, in this
> case:
>
> (joined-products)
>
> Clojure tries to cast the first element of the list (joined-products) to
> be used as a Clojure function (clojure.lang.IFn), but it's a lazy
> sequence (clojure.lang.LazySeq).
>
> You just don't need the list:
>
> user=> joined-products
> (#user.Product{...} #user.Product{...} #user.Product{...} ...)
>
> --
> Best,
> Ben
>
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