2010/1/29 Michael Wood <esiot...@gmail.com>:
>> (doseq [d data-seq]
>>  (.submit clojure.lang.Agent/pooledExecutor (cast Callable #(foo d))))
>
> What's the purpose of the cast here?
>
> #(...) is an fn, which is Callable by definition, isn't it?  So
> wouldn't that line be equivalent to:
> (.submit clojure.lang.Agent/pooledExecutor #(foo d)))

Yes and no... submit is overloaded on Callable and Runnable and #(foo
d) implements both.
user=> (.submit clojure.lang.Agent/pooledExecutor #(inc 1))
java.lang.IllegalArgumentException: More than one matching method found: submit

The cast was just a quick hack to make the example work.

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