(?<!egg[\n*\s*])(yolk)
eggyolk #pass
egg yolk #notpass
egg yolk #pass
How I can make sure the third string does not get passed as I made sure it looked behind multiple whitespace characters and new-lines.
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@dvo https://regex101.com/r/FvgoOF/1 I get a pattern error – md123 Oct 16 '19 at 19:59
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What is your regex platform? – anubhava Oct 16 '19 at 20:04
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You have selected python on regex101. I think `(? – The fourth bird Oct 16 '19 at 20:05
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@anubhava python – md123 Oct 16 '19 at 20:05
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@Thefourthbird that did not work – md123 Oct 16 '19 at 20:06
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So why not use positive lookbehind e.g. `(?<=\begg)yolk` – anubhava Oct 16 '19 at 20:07
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@md123 See https://rextester.com/XHQ48818 You could select javascript on regex101 (which is not the same engine but gives the same result) https://regex101.com/r/BtmB4C/1 Note that `\s` also matches `\n` – The fourth bird Oct 16 '19 at 20:10
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@Thefourthbird that's exactly what i want, but i'm using python – md123 Oct 16 '19 at 20:13
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1@md123 That will work if you use the regex module https://pypi.org/project/regex/ You could also try the suggestion of anubhava – The fourth bird Oct 16 '19 at 20:15
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Python `re` solution is `[y for x,y in re.findall(r"(egg\s+)?(yolk)", text) if not x]`. [This answer](https://stackoverflow.com/a/19502597/3832970) hints at this way of solving the issue. – Wiktor Stribiżew Oct 16 '19 at 21:12