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腾讯网
3 年
深入理解完美哈希
本文对完美 Hash 的概念进行了梳理,通过 Hash 构建步骤来了解它是如何解决 Hash 冲突的,并比较了 Hash 表和完美 Hash 表。下面介绍常见的 Hash 与 Perfect Hash 函数及它们在不同场景的应用。 散列函数(英语:Hash function)又称散列算法、哈希函数,是一种从任何一种 ...
电子工程专辑
1 个月
哈希算法(Hash Function)
将任意长度的二进制值串映射为固定长度的二进制值串,这个映射的规则就是哈希算法,而通过原始数据映射之后得到的二进制值串就是哈希值。 构成哈希算法的条件: 从哈希值不能反向推导出原始数据(所以哈希算法也叫单向哈希算法) 对输入数据非常敏感 ...
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