If you must use Java's HashSet, you can use it untyped: user=> (deftype MyType []) user.MyType user=> (def my-set (HashSet.)) #'user/my-set user=> (.add my-set (MyType.)) true user=> (.add my-set (java.util.Date.)) true
If you need to enforce the use of a type, use a checked set: user=> (def checked (java.util.Collections/checkedSet my-set MyType)) #'user/checked user=> (.add checked (MyType.)) true user=> (.add checked (java.util.Date.)) java.lang.ClassCastException: Attempt to insert class java.util.Date element into collection with element type class user.MyType (NO_SOURCE_FILE:0) On Aug 10, 1:40 pm, Tim Daly <d...@axiom-developer.org> wrote: > I have java code that reads: > > Set<MyType> s = new HashSet(); > > I don't know how to write the parameter <MyType> in clojure > where MyType is a Java class. > > > > Laurent PETIT wrote: > > 2010/8/10 Tim Daly <d...@axiom-developer.org > > <mailto:d...@axiom-developer.org>> > > > How do I construct > > Set<MyType> s = new HashSet(); > > in clojure? > > > Can you be more precise about the context of what you're trying to > > achieve ? > > > 'cause the naive answer to your question is > > > (def s #{}) > > or > > (let [s #{}] ...) > > > but I think you have a usecase in mind I'm not clearling seeing yet > > from your question ... > > > -- > > 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- Hide quoted text - > > - Show quoted text - -- 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
