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; dicts
(func dict? (val)
(and
(list? val) ; TODO should this be automatic?
(or
(eq? 0 (list-length val))
(and
(eq? 1 (list-length val))
(list? (first val)))
(apply and (map list? val)))
(eq? 0 (list-length (filter (lambda (x) (not (eq? x 2))) (map list-length val))))))
(type :dict :list dict?)
(func dict () (list))
(func has? (in :dict key)
(not (empty?
(filter (lambda (x) (eq? (first x) key)) in))))
(func get (d :dict key)
(first (rest (first
(filter (lambda (x) (eq? (first x) key)) d)))))
(func set (d :dict key val)
(if (has? d key)
(map (lambda (x) (if (eq? key (first x)) (list (first x) val) x)) d)
(append d (list key val))))
(func keys (d :dict) (map first d))
(func drop (d :dict key)
(filter (lambda (x) (not (eq? (first x) key))) d))
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