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PORegular expression to match a line that doesn't contain a word?
 

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    1. COProbably a couple years late, but what's wrong with: `([^h]*(h([^e]|$)|he([^d]|$)|hed([^e]|$)))*`? The idea is simple. Keep matching until you see the start of the unwanted string, then only match in the N-1 cases where the string is unfinished (where N is the length of the string). These N-1 cases are "h followed by non-e", "he followed by non-d", and "hed followed by non-e". If you managed to pass these N-1 cases, you successfully *didn't* match the unwanted string so you can start looking for `[^h]*` again
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      1. USstevendesu
    2. CO@stevendesu: try this for 'a-very-very-long-word' or even better half a sentence. Have fun typing. BTW, it is nearly unreadable. Don't know about the performance impact.
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      1. USPeter Schuetze
    3. CO@PeterSchuetze: Sure it's not pretty for very very long words, but it is a viable and correct solution. Although I haven't run tests on the performance, I wouldn't imagine it being too slow since most of the latter rules are ignored until you see an h (or the first letter of the word, sentence, etc.). And you could easily generate the regex string for long strings using iterative concatenation. If it works and can be generated quickly, is legibility important? That's what comments are for.
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