Also see clojure.core/remove.

On Thu, Aug 21, 2014 at 4:04 PM, Sam Ritchie <sritchi...@gmail.com> wrote:

> I think you want complement, like (filter (complement odd?) ...)
>
>   Andy C <andy.coolw...@gmail.com>
>  August 21, 2014 at 2:01 PM
> Hi,
>
>
> I was wondering what is the nicest way to do filter-not in Clojure. Here
> are 3 expressions:
>
> user=> (filter #(apply = %) '([1 2] [1 1]))
> ([1 1])
> user=> (filter #(apply not= %) '([1 2] [1 1]))
> ([1 2])
> user=> (filter #(not (apply = %)) '([1 2] [1 1]))
> ([1 2])
>
>
> First one is just a base filtering. Second is taking advantage of having
> inverted predicate. Now let's assume that we have only a "positive"
> predicate, hence we would have to invert it by hand. That leads me to 3rd
> expression above.
>
> I was wondering though is it is possible to somehow get "not" closer to
> "=", so the fact that we invert it is more obvious ...
>
> Is it possible to do that? Or perhaps there is an easier way to code it up
> all together ?
>
> Thx,
> Andy
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