On Wed, Sep 23, 2009 at 7:14 AM, Timothy Pratley <timothyprat...@gmail.com>wrote:
> When it useful to be able to deref inside a dosync without ensuring? > In a read-only transaction. > Ensure seems like a more safe default of what I'd expect from a > transaction. So why not make deref automatically ensure within a > dosync? It takes a bit of care to remember to use ensure instead of > deref in a dosync. > You only need to ensure if you don't use alter or ref-set later. The typical use case for ensure is: (when (a-predicate? (ensure foo)) (alter bar f arg1 arg2)) Christophe --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en -~----------~----~----~----~------~----~------~--~---
