REGEX: Select everything NOT equal to a certain string

This should be straightforward. I need a re开发者_C百科gular expression that selects everything that does not specifically contain a certain word.

So if I have this sentence: "There is a word in the middle of this sentence." And the regular expression gets everything but "middle", I should select everything in that sentence but "middle".

Is there any easy way to do this?

Thanks.

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It is not possible for a single regex match operation to be discontinuous.

You could use two capturing groups:

(.*)middle(.*)

Then concatenate the contents of capturing groups 1 and 2 after the match.

You may wish to enable the "dot also matches newline" option in your parser.
See for example Java's DOTALL, .NET's Singleline, Perl's s, etc.

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Positive lookaround is the way to go:

/^(.+)(?=middle)/ -- gets everything before middle, not including middle

and

/(?!middle)(.+)$/ -- gets everything after middle, not including middle

Then you just merge the results of both