Well, that's how the key itself is useful. What I'm wondering is why it is useful for the key to be passed to the watching function every time it's called.
On Oct 26, 1:13 pm, pmf <phil.fr...@gmx.de> wrote: > On Oct 26, 8:12 pm, samppi <rbysam...@gmail.com> wrote: > > > According to the docs, the function passed into an add-watch call > > receives four arguments. Its first argument is a "key". This key seems > > to be the same key as the key passed into the add-watch call, and so > > would always be the same, for the same ref and function. What is the > > point of this argument then? When would it vary? > > The last part of add-watch's documentation explains it (when you want > to remove the watcher again, you need the key to identify it). --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
