On Mon, Jan 26, 2009 at 4:48 PM, James Reeves <weavejes...@googlemail.com>wrote:
> > On Jan 26, 10:29 pm, Cosmin Stejerean <cstejer...@gmail.com> wrote: > > Can you help me understand the difference between this and use (or :use > in > > ns)? > > use is internal to the current namespace. You can use other namespaces > without their publics being added to the current namespace. So: > > => (ns a) > => (def x 10) > => (ns b (:refer a)) > => x > 10 > => (ns c (:refer b)) > => x > java.lang.Exception: Unable to resolve symbol: x in this context > > You can see that just because b refers to a, it doesn't mean that c > gets x by referring to b. This is usually what you want, as you don't > want your namespaces to be cluttered up every time you call use or > refer. However, for libraries with lots of namespaces, sometimes you > want to group very specific namespaces into more generic packages, and > that's what immigrate does: > > => (ns a) > => (def x 10) > => (ns b) > => (immigrate 'a) > => x > 10 > => (ns c (:refer b)) > => x > 10 > > - James > Thanks. I didn't realize that things brought in with refer weren't also exposed to other namespaces. That's actually something I do very often in Python. -- Cosmin Stejerean http://offbytwo.com --~--~---------~--~----~------------~-------~--~----~ 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 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 -~----------~----~----~----~------~----~------~--~---
