How do I cope with lazy iterators?

Question

I\'m trying to sort an array with a map() over an iterator.

struct A {
    b: Vec,
}

#[derive(PartialEq, Eq, PartialOrd, Ord)]
struct          


        

Answer 1

I use for_each. According to the doc:

It is equivalent to using a for loop on the iterator, although break and continue are not possible from a closure. It's generally more idiomatic to use a for loop, but for_each may be more legible when processing items at the end of longer iterator chains. In some cases for_each may also be faster than a loop, because it will use internal iteration on adaptors like Chain.