rustHow to borrow iterator in Rust

To borrow an iterator in Rust, you can use the Iterator::by_ref method. This method returns an iterator that borrows the original iterator.

let v = vec![1, 2, 3];
let mut v_iter = v.iter();
let borrowed_iter = v_iter.by_ref();

for i in borrowed_iter {
    println!("{}", i);
}

Output example

1
2
3

The code above borrows the iterator v_iter and stores it in borrowed_iter. The for loop then iterates over borrowed_iter and prints out the elements.

Code explanation

• let v = vec![1, 2, 3];: creates a vector v with elements 1, 2, and 3.
• let mut v_iter = v.iter();: creates an iterator v_iter over the elements of v.
• let borrowed_iter = v_iter.by_ref();: borrows the iterator v_iter and stores it in borrowed_iter.
• for i in borrowed_iter {: iterates over borrowed_iter.
• println!("{}", i);: prints out the elements of borrowed_iter.

Helpful links

• Iterator::by_ref

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