This code uses the JGraphT graphing package which
wants to create a graph where the types of the
vertices and edges are generics, as in:
JGraphT<MyVertexType,MyEdgeType> graph = ....
and I'm at a loss for how to instantiate a graph in clojure.
Armando Blancas wrote:
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 ...
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