Getting familiar with Rust's syntax

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@Zhwazi Ай бұрын

1:58 Rust has a return keyword. Returns are implicit at the end of a function, and leaving them implied at the end is idiomatic, but early returns still use the return keyword.

@francescociulla Ай бұрын

you are right! I think this is the best way to introduce it to the beginners, but thanks for pointing it out!

@Brocodefound1677 Ай бұрын

Finally here 😃 Francesco where is the practise excercise?

@francescociulla Ай бұрын

what do you mean?

@ossurf Ай бұрын

Francesco n. 1!!!!!!!!!

@francescociulla Ай бұрын

ecco il secco!

@ossurf Ай бұрын

manca poo ai 300.000!

@francescociulla Ай бұрын

quasi!

@ok-alarm Ай бұрын

still struggling with lifetimes and some ownership rules. 😅

@francescociulla Ай бұрын

I can feel you, have you checked the dedicated videos?

@antoniong4380 Ай бұрын

The way you explain Return and lifetimes might cause misunderstanding.

@antoniong4380 Ай бұрын

Return are optional keywords. Can be used to do an early return instead of "There's no return keyword". Or rather, it should've been "Has implicit return" Lifetimes analogy would make more sense if you say "I can't leave yet because you have my 'ticket plane'" instead of "You haven't returned my book" This (oversimplified) implies that an action can't be done because the green-ticket to do something is currently held by someone else. Also, the example of the function isn't really helpful. It is more relevant to the callsite, instead of the function body. In the context of the function, the return lifetime will be the overlapping range(or shortest lifetime) of both parameters. This nuance, however only matters to the callsite, and is easier to see why lifetime would matter.

@francescociulla Ай бұрын

Hey Antonio, yes you are correct. I use the return keyword and I thought this was more to show the beginners the best practice, but yes, there's the return keyword in Rust and I probably will make a comment about this. About lifetimes, that's a nice analogy, I should have used it. Thanks for taking the time to write this!