On 27 May 2011 18:30, Michael Wood wrote:
[...]
> or:
>
> (first (filter (complement nil?) coll))
Ah, sorry, I see Sam already suggested this one.
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On 27 May 2011 18:01, MarisO wrote:
> there is find-first in contrib
>
> (find-first #(not (nil? %)) sol)
Or:
(find-first (complement nil?) coll)
or:
(first (filter (complement nil?) coll))
but I like Meikel's (first (keep identity coll)) suggestion, even if I
find it less straight-forward.
there is find-first in contrib
(find-first #(not (nil? %)) sol)
On May 27, 3:12 pm, Meikel Brandmeyer wrote:
> Hi,
>
> Am Freitag, 27. Mai 2011 15:56:47 UTC+2 schrieb MarisO:
>
>
>
> > To find first defined Option in scala I do this:
>
> > sol.find(_.isDefined).getOrElse(None)
>
> > I managed
Hi,
Am Freitag, 27. Mai 2011 15:56:47 UTC+2 schrieb MarisO:
>
> To find first defined Option in scala I do this:
>
> sol.find(_.isDefined).getOrElse(None)
>
> I managed to do the same in clojure:
>
> (some #(if (nil? %) false %) sol)
>
> Is there a better way ?
Another way: (first (keep ide
> false is not nil.
Ugh! Well spotted :)
U
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On Fri, May 27, 2011 at 16:03, Ulises wrote:
> You could use identity as a predicate to filter:
>
> user=> (def s [nil nil 1 2 3])
> #'user/s
> user=> (first (filter identity s))
> 1
> user=>
(first (filter identity [nil false :oops])) --> :oops
false is not nil.
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You could use identity as a predicate to filter:
user=> (def s [nil nil 1 2 3])
#'user/s
user=> (first (filter identity s))
1
user=>
U
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Hey, how about this?
(defn first-non-nil
[xs]
(first (filter (complement nil?)
xs)))
On Fri, May 27, 2011 at 9:56 AM, MarisO wrote:
> To find first defined Option in scala I do this:
>
> sol.find(_.isDefined).getOrElse(None)
>
> I managed to do the same in clojure:
>
> (so
To find first defined Option in scala I do this:
sol.find(_.isDefined).getOrElse(None)
I managed to do the same in clojure:
(some #(if (nil? %) false %) sol)
Is there a better way ?
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