On Jan 29, 2009, at 5:23 PM, Cosmin Stejerean wrote:
>
> If in? was to be added how would it behave when given a map as the
> first argument? I would rather have "contains?" do the right thing
> for list/vectors/sets and keep its current behavior for maps. If we
> do actually need a function like contains that ONLY accepts a map as
> the first argument I think a name like has-key? is the most intuitive.
>
I think "in?" would behave like "contains?" when given a map:
(in? {:a 1 :b 2 :c 3} :a) => true
(in? {:a 1 :b 2 :c 3} :d) => false
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