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matrix: Add linked list
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@XuShaohua
XuShaohua committed Aug 15, 2024
1 parent 0fd42dd commit 9ff5d67
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5 changes: 2 additions & 3 deletions list/src/doubly_linked_list.rs
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Expand Up @@ -632,6 +632,8 @@ impl<T> DoubleEndedIterator for IntoIter<T> {
}
}

impl<T> ExactSizeIterator for IntoIter<T> {}

impl<'a, T> Iterator for Iter<'a, T> {
type Item = &'a T;

Expand Down Expand Up @@ -662,8 +664,6 @@ impl<'a, T> Iterator for Iter<'a, T> {
}
}

impl<T> ExactSizeIterator for IntoIter<T> {}

impl<'a, T> DoubleEndedIterator for Iter<'a, T> {
fn next_back(&mut self) -> Option<Self::Item> {
if self.len == 0 {
Expand All @@ -681,7 +681,6 @@ impl<'a, T> DoubleEndedIterator for Iter<'a, T> {

impl<'a, T> ExactSizeIterator for Iter<'a, T> {}


impl<'a, T> Iterator for IterMut<'a, T> {
type Item = &'a mut T;

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5 changes: 3 additions & 2 deletions src/SUMMARY.md
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Expand Up @@ -13,8 +13,9 @@
- [矩阵 Matrix](matrix/index.md)
- [矩阵的常用操作](matrix/adt.md)
- [稀疏矩阵](matrix/sparse-matrix/index.md)
- [数组表示法](matrix/sparse-matrix/array.md)
- [List of Lists 表示法](matrix/sparse-matrix/list-of-lists.md)
- [数组](matrix/sparse-matrix/array.md)
- [链表](matrix/sparse-matrix/linked-list.md)
- [List of Lists](matrix/sparse-matrix/list-of-lists.md)
- [字典 Dictionary](matrix/sparse-matrix/dictionary.md)
- [动态数组 Vector](vector/index.md)
- [动态数组的常用操作](vector/adt.md)
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8 changes: 4 additions & 4 deletions src/matrix/sparse-matrix/array.md
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# 数组表示法
# 数组

数组表示法来存储稀疏矩阵, 就是只在数组中存储里面非零的元素.

数组中每个项包含三部分:
数组中每个元素项都包含三部分:

- 该元素在矩阵中的行号
- 该元素在矩阵中的列号
Expand All @@ -28,13 +28,13 @@
- 从头到尾以行编号递增
- 相同行编号时, 以列编号递增
- 即整体上行编号有序递增, 整体上列编号无序, 但局部上列编号递增
- 查找矩阵中某个节点的值时的性能是 `O(log(m) * log(n))`, 其中 `m` 和 `n` 是矩阵的行列数,
- 查找矩阵中某个节点的值时的性能是 `O(log(m) * log(n))`, 其中 `m` 和 `n` 是矩阵中非 0 元素的最大行列数,
因为是有序排列的, 可以用二分查找法
- 比较适合存放固定不变的矩阵, 插入或者删除元素的成本比较高

## 算法的实现

这里只实现了构造稀疏矩阵和查找元素等少数方法, 因为插入和删除元素的效率低, 我们不把这种方法作为存储矩阵的主要方式.
这里只实现了构造稀疏矩阵和查找元素等少数方法.

```rust
{{#include assets/array_sparse_matrix.rs:5:86}}
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47 changes: 25 additions & 22 deletions src/matrix/sparse-matrix/assets/array-sparse-matrix.drawio
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2 changes: 1 addition & 1 deletion src/matrix/sparse-matrix/assets/array-sparse-matrix.svg
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