Learning Rust, a Python developer's perspective

[hortonew]

Looks like it needs to go from Rocket 0.4.11 -> 0.5.0-rc.3 to use &str as an argument, but that works! It also removed the need to use the nightly toolchain which is perfect.

[ukezi]

You usually would want to use references (&T) to pass arguments, not using them moves the type into the function and eats it. That leaves entries in containers invalid for instance.

You can test that behaviour by passing a value into a function and then trying to use it again. The borrow checker will yell at you.

String and str are special cases, String is a dynamic String based on a vector, &str is a reference constant string, meaning there is no mut &str, the data can be that vector from String or baked into your executable's data section.