On 9 August 2010 22:16, Alan wrote:
> Weird. I wonder if I was using an outdated version of Clojure or (more
> likely) assumed from (doc drop-while) that it wouldn't handle false
> the way I wanted. When doc says "not nil" should I assume it means
> "neither nil nor false", or should the doc for d
> When doc says "not nil" should I assume it means
> "neither nil nor false"
Nope, false won't be taken as nil; in boolean expressions nil
evaluates to false. drop-while's doc mentions only nil but since it's
the predicate's return value it should be clear enough, I think.
--
You received this m
Weird. I wonder if I was using an outdated version of Clojure or (more
likely) assumed from (doc drop-while) that it wouldn't handle false
the way I wanted. When doc says "not nil" should I assume it means
"neither nil nor false", or should the doc for drop-while be updated?
user=> (doc drop-while
Also sorry the indentation is so awful. How do I get Google to let me
compose/edit in a fixed-width font?
On Aug 9, 12:09 pm, Alan wrote:
> Hi all, I'm new to the group; I have some experience with both CL and
> Java, though it's been a while for each. Anyway I really like Clojure
> as a way of c
On Aug 9, 2:09 pm, Alan wrote:
> Hi all, I'm new to the group
Welcome!
> I wanted to define a ring function, which takes as input
> N objects, and returns a hash table mapping object N to object N+1
> (mod N). I intended to use this to describe a compass object:
> (ring :w :n :e :s) should resul
It works with booleans:
user=> (drop-while neg? [-3 -2 -1 0 1 2 3 ])
(0 1 2 3)
user=> (class (neg? -5))
java.lang.Boolean
On Aug 9, 12:09 pm, Alan wrote:
> Hi all, I'm new to the group; I have some experience with both CL and
> Java, though it's been a while for each. Anyway I really like Clojur
you can do this using partition.
let's assume I first define a
user=> (def a [:w :n :e :s])
#'user/a
user=> (partition 2 1 (conj a (first a)))
((:w :n) (:n :e) (:e :s) (:s :w))
gives you the pairs you need.
then you just need to turn it into hash-map
by doing
(map #(apply hash-map %) (partit
Hi all, I'm new to the group; I have some experience with both CL and
Java, though it's been a while for each. Anyway I really like Clojure
as a way of combining the best parts of the two languages, but I'm
still getting the hang of it and there are often things that confuse
me.
For example, I wan
