linux - 如果破折号在字符串中，则 grep -w 不是唯一的

Question

i如果破折号在字符串中“grep -w”不是唯一的。我该如何解决这个问题？

示例:

文件1:

football01
football01test

# grep -iw ^football01
football01

文件 2:

football01
football01-test

# grep -iw ^football01
football01
football01-test

Answer 1

这是预期和记录的行为:

   -w, --word-regexp
          Select  only  those lines containing matches that form whole words.  The test is that the
          matching substring must either be at the beginning of the line, or preceded by a non-word
          constituent  character.   Similarly, it must be either at the end of the line or followed
          by a non-word constituent character.  Word-constituent characters  are  letters,  digits,
          and the underscore.

如果您添加破折号，它会终止您的第一个单词，因为破折号是“非单词组成字符”。如果你把这些词写在一起，那么 word-regexp grep 会把它当作一个词而不匹配它。

你到底想做什么？

如果你只想知道你的台词是不是 football01 而没有别的，你可以这样做

grep -i "^football01$"

如果您想实现其他目标，请您解释一下它是什么。