Struct hash_ord::ord_map::Cursors

pub struct Cursors<'a, K, V> where
    K: Ord + 'a,
    V: 'a,  { /* fields omitted */ }

An cursor of a OrdMap.

This struct is constructed from the find_cursors method on OrdMap.

Methods

impl<'a, K, V> Cursors<'a, K, V> where     K: Ord,

pub fn next(&mut self)

Move cursor to next pos.

pub fn prev(&mut self)

Move cursor to next pos.

pub fn get(&self) -> Option<(&K, &V)>

Returns the (&Key, &Value) pair of current pos.

Examples

use hash_ord::ord_map::OrdMap;
use hash_ord::ord_map::Cursors;

let mut map = OrdMap::new();
map.insert(1, 1);
map.insert(2, 2);
map.insert(3, 3);
let mut cursors = map.find_cursors(&2);
assert_eq!(*cursors.get().unwrap().0, 2);

pub fn get_mut(&mut self) -> Option<(&K, &mut V)>

Returns the (&Key, &mut Value) pair of current pos.

Examples

use hash_ord::ord_map::OrdMap;
use hash_ord::ord_map::Cursors;

let mut map = OrdMap::new();
map.insert(1, 1);
map.insert(2, 2);
map.insert(3, 3);
let mut cursors = map.find_cursors(&2);
*cursors.get_mut().unwrap().1 = -2;
assert_eq!(*cursors.get().unwrap().1, -2);

pub fn erase_then_next(&mut self) -> Option<(K, V)>

Erase current pos, and move to next.

Examples

use hash_ord::ord_map::OrdMap;
use hash_ord::ord_map::Cursors;

let mut map = OrdMap::new();
map.insert(1, 1);
map.insert(2, 2);
map.insert(3, 3);
let mut cursors = map.find_cursors(&2);
let x = cursors.erase_then_next();
assert_eq!(x.unwrap().0, 2);
assert_eq!(*cursors.get().unwrap().0, 3);

pub fn erase_then_prev(&mut self) -> Option<(K, V)>

Erase current pos, and move to prev.

Examples

use hash_ord::ord_map::OrdMap;
use hash_ord::ord_map::Cursors;

let mut map = OrdMap::new();
map.insert(1, 1);
map.insert(2, 2);
map.insert(3, 3);
let mut cursors = map.find_cursors(&2);
let x = cursors.erase_then_prev();
assert_eq!(x.unwrap().0, 2);
assert_eq!(*cursors.get().unwrap().0, 1);