Hello,
On 21 Okt., 19:08, Chouser <[EMAIL PROTECTED]> wrote:
> Here's my implementation:
>
> (defmacro >>_ [& exprs]
> (list 'let (apply vector (mapcat (fn [expr] (list '_ expr)) exprs)) '_ ))
Now this is a nice idea.
> I used it a couple times after first writing it, but have since failed
> to find much use for it. I guess I wouldn't really recommend it.
I often encountered the case, that I want to do an apply in the
-> or eg. some filter or map, which also does not work. But maybe
you are right, and this is a sign that the code is bad.
Nevertheless here a combined version, which does not need to
specify the _ all the time.
(defmacro >>
[x & forms]
`(let ~(apply vector
'_ x
(mapcat (fn [form]
(if (seq? form)
(if (some #(= '_ %) form)
(list '_ form)
(list '_ (list* (first form) '_ (rest
form))))
(list '_ (list form '_))))
forms))
~'_))
Sincerely
Meikel
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