updates.md

Updates

---

UPDATE 25 June 2022:
While learning the Rust programming language I discovered an interesting thing somewhat related to this...

Rust has 3 kinds of loops: loop, while and for. The loop variant can be named or labeled to easily refer to it when using nested loops.

The interesting part is HOW these loops are named in Rust. The name of the loop starts with a single quote i.e. our apostrophe!

Here's an example of using 2 nested loops in Rust:

fn main() {
    let mut count = 0;
    'counting_up: loop {
        println!("count = {}", count);
        let mut remaining = 10;

        loop {
            println!("remaining = {}", remaining);
            if remaining == 9 {
                break;
            }
            if count == 2 {
                break 'counting_up;
            }
            remaining -= 1;
        }

        count += 1;
    }
    println!("End count = {}", count);
}

Notice that 'counting_up thingy. That's the label of the outer loop. That label is used the inner loop to break out of the loop.

But the cool thing is that the super-smart people developing the Rust programming language also came up with the same idea: Prepending a name with a single quotation mark symbol — our apostrophe — as an easy and terse way to denote something special. Yay!

---