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wc 用法错误 #20

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Gnosnay opened this issue Jul 16, 2019 · 0 comments

Gnosnay commented Jul 16, 2019

过滤器/README.md 中wc命令解释有问题

常用选项描述

l 只统计行数

w 只统计单词数

m 只统计字符数

c 只统计字节数

L 最大行的长度

不管指定选项的顺序如何，其信息显示的顺序都是固定的，遵从上面从上到下的顺序。

若不加参数，则默认显示l，w，m三项。

若不加参数，则默认显示l，w，m三项。说明有误。实际应该等价于 -lwc

ref

By default, wc prints three counts: the newline, words, and byte counts.

造成误解的一个很大的原因可能因为，字符数和字节数在某些情况下相等了。为什么相等呢？因为

运行wc的机器对文件内容的解码可能不支持某些特殊字符
文件内容就是单纯的ascii码

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