> nil complects non-existence, false, and empty.
Let's explore that a little further:
* Non-existence
- Accessing a local or var that has never been declared
* False
- (if nil :never-here :but-here)
* Empty
- (seq [])
And maybe there is another?
* Not set
- (def x)
- (:x {:a 1})
But which one should nil actually mean? Given a green-field scenario that is.
I can definitely see where you're going, but I wonder if the use of
nil in Clojure is the result of a cost/benefit analysis in relation to
Java interop?
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