Trait crow_util::traits::GetTwo

pub trait GetTwo<T> {
    fn get_two(
        &mut self, 
        index_a: usize, 
        index_b: usize
    ) -> Option<(&mut T, &mut T)>;
    unsafe fn get_two_unchecked(
        &mut self, 
        index_a: usize, 
        index_b: usize
    ) -> (&mut T, &mut T);
}

Used to mutably borrow 2 elements from a collection at once.

Required Methods

fn get_two(
    &mut self,
    index_a: usize,
    index_b: usize
) -> Option<(&mut T, &mut T)>

Mutably borrows 2 elements at once.

In case index_a is equal to index_b or one of them is out of bounds this function returns None.

Examples

use crow_util::traits::*;
 
let mut x = vec![0, 1, 2, 3, 4, 5];
assert_eq!(x.get_two(0, 3), Some((&mut 0, &mut 3)));
assert_eq!(x.get_two(1, 1), None);

unsafe fn get_two_unchecked(
    &mut self,
    index_a: usize,
    index_b: usize
) -> (&mut T, &mut T)

Mutably borrows 2 elements at once without checking if it is safe to do so.TakeTwo

This is genarally not recommended, use with caution! For a safe alternative see get_two

Examples

use crow_util::traits::*;
 
let mut x = vec![0, 1, 2, 3, 4, 5];
assert_eq!(unsafe { x.get_two_unchecked(0, 3) }, (&mut 0, &mut 3));

Implementations on Foreign Types

impl<T> GetTwo<T> for Vec<T>

fn get_two(     &mut self,     index_a: usize,     index_b: usize ) -> Option<(&mut T, &mut T)>

unsafe fn get_two_unchecked(     &mut self,     index_a: usize,     index_b: usize ) -> (&mut T, &mut T)

Implementors