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fix(Update hash_collision.md):开放寻址只有一个桶不像链式地址有多个桶 #1558

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fix(Update hash_collision.md):开放寻址只有一个桶不像链式地址有多个桶 #1558

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2 changes: 1 addition & 1 deletion docs/chapter_hashing/hash_collision.md
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- **插入元素**：通过哈希函数计算桶索引，若发现桶内已有元素，则从冲突位置向后线性遍历（步长通常为 $1$ ），直至找到空桶，将元素插入其中。
- **查找元素**：若发现哈希冲突，则使用相同步长向后进行线性遍历，直到找到对应元素，返回 `value` 即可；如果遇到空桶，说明目标元素不在哈希表中，返回 `None` 。

下图展示了开放寻址（线性探测）哈希表的键值对分布。根据此哈希函数，最后两位相同的 `key` 都会被映射到相同的桶。而通过线性探测，它们被依次存储在该桶以及之下的桶中。
下图展示了开放寻址（线性探测）哈希表的键值对分布。根据此哈希函数，最后两位相同的 `key` 都会被映射到桶中相同位置并产生冲突。而通过线性探测，它们被依次存储在该桶内原冲突位置及其之后的位置中。

![开放寻址（线性探测）哈希表的键值对分布](hash_collision.assets/hash_table_linear_probing.png)

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