正则表达式匹配不包含单词的行 - Regular expression to match a line that doesn't contain a word

问题：

I know it's possible to match a word and then reverse the matches using other tools (eg grep -v ). 我知道能够匹配一个单词，而后使用其余工具（例如grep -v ）反转匹配。 However, is it possible to match lines that do not contain a specific word, eg hede , using a regular expression? 可是，是否可使用正则表达式匹配不包含特定单词（例如hede ）的行？

Input: 输入：

hoho
hihi
haha
hede

Code: 码：

grep "<Regex for 'doesn't contain hede'>" input

Desired output: 所需的输出：

hoho
hihi
haha

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解决方案：

参考一： https://stackoom.com/question/1hg6/正则表达式匹配不包含单词的行
参考二： https://oldbug.net/q/1hg6/Regular-expression-to-match-a-line-that-doesn-t-contain-a-word