查看“︁Rust iter and into iter”︁的源代码

* iter() iterates over the items by reference
* iter_mut() iterates over the items, giving a mutable reference to each item
* into_iter() iterates over the items, moving them into the new scope

So for x in my_vec { ... } is essentially equivalent to my_vec.into_iter().for_each(|x| ... ) - both move the elements of my_vec into the ... scope.

If you just need to look at the data, use iter, if you need to edit/mutate it, use iter_mut, and if you need to give it a new owner, use into_iter.<ref>https://stackoverflow.com/questions/34733811/what-is-the-difference-between-iter-and-into-iter</ref> 
<ref>https://hermanradtke.com/2015/06/22/effectively-using-iterators-in-rust.html/</ref>

[[Category:Rust]]
[[Category:Programming]]