I don't think the function passed to some should be called a
predicate, since it is not constrained to true/false. The docstring
agrees with you, however.
Stuart
Hi,
It means that some of the maps can be nil, but at least one of them
has to be non-nil. some requires a predicate, but
Hi,
Here is def of merge:
(defn merge
[ maps]
(when (some identity maps)
(reduce #(conj (or %1 {}) %2) maps)))
How can I interpret when (some identity maps)?
Thanks
-sun
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Hi,
It means that some of the maps can be nil, but at least one of them
has to be non-nil. some requires a predicate, but since nil is
logical false, we can just use identity. Here's the behavior:
user (merge nil nil nil)
nil
user (merge {:a 1} nil {:b 2})
{:b 2, :a 1}
-Stuart
