Part 15 - Functions as Objects and Multithreading

Having Functions act as objects exposes three very useful methods:

1. function.Invoke(<arguments>) as <return type>
2. function.BeginInvoke(<arguments>) as IAsyncResult
3. function.EndInvoke(IAsyncResult) as <return type>

.Invoke just calls the function normally and acts like it was called with just regular parentheses ().
.BeginInvoke starts a seperate thread that does nothing but run the function invoked.
.EndInvoke finishes up the previously invoked function and returns the proper return type.

Since .Invoke is a function itself, it has its own .Invoke.

Here's a good example of .BeginInvoke

The output produces the Fibonacci sequence roughly every 200 milliseconds (because that's what the delay is). This will produce an overflow after it gets up to 2^64.
The important thing is that it stops cleanly if you press Enter.

Exercises

1. Think of an exercise

Go on to Part 16 - Generators