正則表達式匹配不包含單詞的行 - Regular expression to match a line that doesn't contain a word

問題：

I know it's possible to match a word and then reverse the matches using other tools (eg grep -v ). 我知道能夠匹配一個單詞，而後使用其餘工具（例如grep -v ）反轉匹配。 However, is it possible to match lines that do not contain a specific word, eg hede , using a regular expression? 可是，是否可使用正則表達式匹配不包含特定單詞（例如hede ）的行？

Input: 輸入：

hoho
hihi
haha
hede

Code: 碼：

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

Desired output: 所需的輸出：

hoho
hihi
haha

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解決方案：

參考一： https://stackoom.com/question/1hg6/正則表達式匹配不包含單詞的行
參考二： https://oldbug.net/q/1hg6/Regular-expression-to-match-a-line-that-doesn-t-contain-a-word