Re: how not to deref @ again?

[Meikel Brandmeyer]

Hi,

Am 11.02.2009 um 23:59 schrieb wubbie:

In some post Rich recommended:
  (let [z (ref 0)]
  (defn add2 [] (dosync (alter z #(inc %)))))

Just a sidenote: You don't need #(inc %). inc alone
is perfectly sufficient.

(let [z (ref 0)]
  (defn add2
    []
    (dosync (alter z inc))))

Then
Is there any way not to deref again for this? It's from ants.clj
 (alter oldp assoc :pher (inc (:pher @oldp)))

You might use update-in:

(alter oldp update-in [:pher] inc)

Sincerely
Meikel

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