将sed或awk中的字符串大写 [英] Capitalize strings in sed or awk

问题描述

我想在bash脚本中使用三种大写的字符串.我认为sed/awk是我最好的选择，但我不确定.鉴于以下要求，最好的方法是什么?

I have three types of strings that I'd like to capitalize in a bash script. I figured sed/awk would be my best bet, but I'm not sure. What's the best way given the following requirements?

1. 单字
   例如taco -> Taco

1. single word
   e.g. taco -> Taco

用连字符分隔的多个单词
例如my-fish-tacos -> My-Fish-Tacos

multiple words separated by hyphens
e.g. my-fish-tacos -> My-Fish-Tacos

用下划线分隔的多个单词
例如my_fish_tacos -> My_Fish_Tacos

multiple words separated by underscores
e.g. my_fish_tacos -> My_Fish_Tacos

推荐答案

不需要使用捕获组(尽管&是一个捕获组):

There's no need to use capture groups (although & is a one in a way):

echo "taco my-fish-tacos my_fish_tacos" | sed 's/[^ _-]*/\u&/g'

输出:

Taco My-Fish-Tacos My_Fish_Tacos

转义的小写字母"u"将匹配的子字符串中的下一个字符大写.

The escaped lower case "u" capitalizes the next character in the matched sub-string.

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