Dissoc behaviour on records really surprised me:
user> (defrecord Foo [bar])
;; => user.Foo
user> (def foo (->Foo nil))
;; => #'user/foo
user> (dissoc foo :bar)
;; => {}
user> (assoc foo :bar nil)
;; => #user.Foo{:bar nil}
It lead to a bug where a component of mine, which I was using to
dispatch in a multimethod was replaced with an empty map:
https://github.com/stig/accounts/commit/f4124b69cfc9fdc201b29f97e33a5b7bd6279e7f
*toy project alert*
As an aside, I'm now starting to understand why all the components
examples use `assoc foo :bar nil` rather than dissoc...
Stig
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