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Update hash_map.md (#1802)

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* Update hash_map.md

对目标句子的表达略微修改，使得前后句子的语义更加一致。

* Fix wording for bucket index calculation

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Co-authored-by: Yudong Jin <krahets@163.com>
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2025-09-20 19:26:04 +08:00
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docs/chapter_hashing/hash_map.md
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@ -559,7 +559,7 @@
输入一个 `key` ，哈希函数的计算过程分为以下两步。
1. 通过某种哈希算法 `hash()` 计算得到哈希值。
2. 将哈希值对桶数量（数组长度）`capacity` 取模，从而获取该 `key` 对应的数组索引 `index` 。
2. 将哈希值对桶数量（数组长度）`capacity` 取模，从而获取该 `key` 对应的桶（数组索引）`index` 。
```shell
index = hash(key) % capacity