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58 lines
1.4 KiB
58 lines
1.4 KiB
/*
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* File: list_node.rs
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* Created Time: 2023-03-05
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* Author: codingonion (coderonion@gmail.com), rongyi (hiarongyi@gmail.com)
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*/
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use std::cell::RefCell;
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use std::collections::HashMap;
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use std::rc::Rc;
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#[derive(Debug)]
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pub struct ListNode<T> {
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pub val: T,
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pub next: Option<Rc<RefCell<ListNode<T>>>>,
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}
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impl<T> ListNode<T> {
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pub fn new(val: T) -> Rc<RefCell<ListNode<T>>> {
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Rc::new(RefCell::new(ListNode { val, next: None }))
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}
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/* 将数组反序列化为链表 */
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pub fn arr_to_linked_list(array: &[T]) -> Option<Rc<RefCell<ListNode<T>>>>
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where
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T: Copy + Clone,
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{
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let mut head = None;
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// insert in reverse order
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for item in array.iter().rev() {
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let node = Rc::new(RefCell::new(ListNode {
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val: *item,
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next: head.take(),
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}));
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head = Some(node);
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}
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head
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}
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/* 将链表转化为哈希表 */
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pub fn linked_list_to_hashmap(
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linked_list: Option<Rc<RefCell<ListNode<T>>>>,
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) -> HashMap<T, Rc<RefCell<ListNode<T>>>>
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where
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T: std::hash::Hash + Eq + Copy + Clone,
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{
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let mut hashmap = HashMap::new();
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let mut node = linked_list;
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while let Some(cur) = node {
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let borrow = cur.borrow();
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hashmap.insert(borrow.val.clone(), cur.clone());
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node = borrow.next.clone();
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}
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hashmap
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}
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}
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