Iterable Sum in Java?
<p>Is there a library that does this:</p>

<pre><code>public class Iterables{
    private Iterables() {}

    public static &lt;T&gt; int sum(Iterable&lt;T&gt; iterable, Func&lt;T, Integer&gt; func) {
        int result = 0;
        for (T item : iterable)
            result += func.run(item);
        return result;
    }
}

public interface Func&lt;TInput, TOutput&gt; {
    TOutput run(TInput input);
}
</code></pre>
