>
>
> OK, I am working with refs, let's do it!:
>
> (let [x (with-meta (ref {:a 42})
>> {:raw 17})]
>> (alter-meta! x #(update-in % [:raw] inc))
>> (meta x))
>
>
> Nope. IRef cannot be cast to IObj. ...google...google... Hunh? The :meta
> option on ref?
>
> [1] Why the special mechanism?
>
> Well, when in Rome...:
>
> (let [x (ref {:a 42}
>> :meta {:m 17})]
>> (alter-meta! x #(assoc-in % [:m] 64))
>> (meta x))
>> ;; => {:m 64}
>
>
> Booyow!
>
> The bad news is that the metadata is about the map, not the ref.
>
Hmmm. The map inside the ref will change on each update, so the metadata
would be lost. OK, on the ref it goes. But this question remains:
> [2] If I modify the map inside the ref and the ref's metadata at the same
> time, will the latter "stick" even if the former gets rolled back?
>
-hk
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