Babel and clojure vars

Babel and clojure vars

[Lawrence Bottorff]

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Once before I was wondering why :vars doesn't seem to work properly with
clojure. This works:

#+begin_src clojure :var a='(1 2 3 4 5)
(count a)
#+end_src

#+RESULTS:
: 5

as well as this

#+begin_src emacs-lisp :var a=(number-sequence 1 5)
a
#+end_src

#+RESULTS: num-seq-test1
| 1 | 2 | 3 | 4 | 5 |

but this is a no go. . . .

#+begin_src clojure c=(range 10)
(count c)
#+end_src

eval doesn't help, either.


LB

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Re: Babel and clojure vars

[Nick Dokos]

Lawrence Bottorff <borgauf@gmail.com> writes:

> Once before I was wondering why :vars doesn't seem to work properly with clojure. This works:
>
> #+begin_src clojure :var a='(1 2 3 4 5)
> (count a)
> #+end_src
>
> #+RESULTS:
> : 5
>
> as well as this
>
> #+begin_src emacs-lisp :var a=(number-sequence 1 5)
> a
> #+end_src
>
> #+RESULTS: num-seq-test1
> | 1 | 2 | 3 | 4 | 5 |
>
> but this is a no go. . . .
>
> #+begin_src clojure c=(range 10)
> (count c)
> #+end_src
>

Is `range' a clojure function? If so, that's expected:

(info "(org) var") says:

,----
|    The values passed to arguments can either be literal values,
| references, or Emacs Lisp code (see *note Emacs Lisp evaluation of
| variables: var.).
`----

[The syntax is wrong too: it should read

#+begin_src clojure :var c=(range 10)
 (count c)
#+end_src

but it's not going to work unless you define an emacs-lisp function called range
and teach it to emacs.]

The following works (I don't have clojure installed here, so I replaced it with scheme):

--8<---------------cut here---------------start------------->8---
#+BEGIN_SRC emacs-lisp
(defun range (N)
  (if (<= N 1)
      (list N)
    (nconc (range (- N 1)) (list N))))
#+END_SRC

#+begin_src scheme :var c=(range 10)
(define (count l)
   (if (null? l)
     0
     (1+ (count (cdr l)))))

(count c)
#+end_src

#+RESULTS:
: 10
--8<---------------cut here---------------end--------------->8---

-- 
Nick