I like how this highlights the pitfalls of using `as` to cast between types. The article says to prefer using `try_into()` instead of `as`, which is a good suggestion when available, but `as` lets you cast between floats and ints, while `try_into` is not implemented for these type conversions. I think the reasoning is it is unclear `try_into` should fail when it had to round a decimal number down or only when the float was something above the bounds or `NaN`. Regardless it seems like a missed opportunity in the standard library.

https://play.rust-lang.org/?version=stable&mode=debug&editio...