slightly enhanced Higher-Level Abstractions on Enumerations

Andrei has some nice code to work with Enumerations and while showing it to the team today, I tried to chain calls like this:

        [Test]

        public void Can_Chain_Select_Collect_and_More() {

            bool satisfying = Enumerating.On(_array)

                .Select(IsEven)

                .Collect<string>(delegate(string input) { return input + "-" + input; })

                .AreAllSatisfying(Satisfies);

            Assert.IsTrue(satisfying);

        }

        private bool Satisfies(string obj) {

            return obj == "2-2" || obj == "4-4" || obj == "6-6";

        }

But this did not work :-( (To much C# 3.0 exposure I guess) because methods like Select and Collect return ICollection<T>. 

So I changed it. 

You can grab it here: Enumerating.Zip. Of course all praise to Andrei, all blame to me.

How did I do it?

Well I Just changed 

        ICollection<R> Collect<R>(Converter<T, R> convert);

        ICollection<R> Map<R>(Converter<T, R> convert);

        ICollection<T> Select(Predicate<T> satisfies);

        ICollection<T> FindAll(Predicate<T> satisfies);

        ICollection<T> Filter(Predicate<T> satisfies);

        ICollection<T> Reject(Predicate<T> satisfies);

        ICollection<R> SelectThenCollect<R>(Predicate<T> satisfies, Converter<T, R> converter);

        ICollection<T> Sort(Comparison<T> comparison);

to 

        IEnumerating<R> Collect<R>(Converter<T, R> convert);

        IEnumerating<R> Map<R>(Converter<T, R> convert);

        IEnumerating<T> Select(Predicate<T> satisfies);

        IEnumerating<T> FindAll(Predicate<T> satisfies);

        IEnumerating<T> Filter(Predicate<T> satisfies);

        IEnumerating<T> Reject(Predicate<T> satisfies);

        IEnumerating<R> SelectThenCollect<R>(Predicate<T> satisfies, Converter<T, R> converter);

        IEnumerating<T> Sort(Comparison<T> comparison);

So its possible to chain commands that return more than one thing. 

And I added 

        ICollection<T> ToCollection();

to make the tests work.