Message Digests are secure, one-way hash functions that convert arbitrary length data into fixed-length check sum / hash code.

消息摘要是一个安全的、单向的哈希函数，把任意长度的数据转化成固定长度的校验和/哈希码。

youdao

Since it returns an array of config objects, you should always check the length of the returned array.

由于它返回一个配置对象数组，因此您总是要检查返回的数组的长度。

youdao

Then check if the line count exceeds the page length.

然后检查行的总数是否超过页长。

youdao

First, I'm going to do a sanity check strlen so we've used string length, strlen, before.

首先，我先做一个检查,我们以前使用过字符串长度函数。

哈佛公开课 - 计算机科学课程节选

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