Oh wow, did you know that in #Rust you can use Option as an iterator such that your types align, when you want to return a chain of iterators from a function, but also have an else case where the iterator is empty!?

I know, this was a mouthful.😳

Let's look at a playground that shows this:
https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=129eb419d767b71447b408e456773555

This trick is right from the docs on option:

https://doc.rust-lang.org/stable/std/option/#iterating-over-option

What a cunning trick!🤓

Rust, I ❤️ you!

#RustTip #RustTips #RustLang

@follpvosten Nice! 👍

Ok, I'll continue...🙂

✨ did you know ✨

Since #Rust 1.56, std::collections::HashMap<K,V> impls From<[(K, V); N]>

This means the simplest way to create a HashMap is now:

HashMap::from([(1, "Love"), (2, "Rust")]);

https://doc.rust-lang.org/std/collections/hash_map/struct.HashMap.html#impl-From%3C%5B(K%2C%20V)%3B%20N%5D%3E-for-HashMap%3CK%2C%20V%2C%20RandomState%3E

#RustLang #RustTip