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On Saturday, February 15, 2014 12:41:52 AM UTC-5, Mars0i wrote:
>
> Could someone clarify for me why "some?" as a name for not nil makes sense
> at all in the first place? Not criticizing. I just don't understand what
> existence or there being some of something has to do with nil.
>
> Maybe I don't understand the intent of nil. I came to Clojure from Common
> Lisp. nil is a weird beast in CL, but it's also a weird beast in Clojure.
>
> Is the idea that nil is supposed to be an empty structure, and empty? and
> seq are too general? But unlike nil in Common Lisp, nil in Clojure is not
> an empty structure, even though (empty? nil) is true. [], (), (lazy-seq),
> #{}, and {} are empty structures. Am I misunderstanding?
>
I *think* the idea to name it *some* is since nil often means "no value"
(as already said by puzzler). This is also how Scala and F# name it:
http://en.wikipedia.org/wiki/Option_type
And the (some-> ..) macro has existed for a while which works the same so I
think it makes a lot of sense to call it some? instead of non-nil?.
HTH
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