Just because the option isn't there doesn't mean the authors are opinionated about it.
Best thing is probably to open a ticket on github if you'd like to see something new added github.com/rust-lang/ru...

I actually decided to move to an out of the box ECS library, but you can see how I implemented the component storage / querying here. Might revisit it at some point though!
github.com/adamthedash/...

Just ran into this feature while trying to implement an entity component system, thanks for sharing!

I use polar daily for working with csvs
docs.pola.rs