I have a problem with finding a regex pattern that should match any text containing a group of letters, and in the same time it does not contain another group of letters.
Iterating a file line by line, I need to extract the lines containing the word 'input', AND not containing the word 'type'.
So, 'input damian whatever' is a match, while 'input damian type whatever' is not.
So why Regular expression is required?
As you know the exact text which you need so try this.
Ioan Damian Sirbu
posted 10 years ago
I was giving an arbitrary example.
The concrete situation is:
- I need to make a search in Eclipse in all files.
- I need to find the files that contain a custom tag that is like this <input type="calendar"> but is not like <input type="calendar" theme="simple">
I think that using Eclipse's regex matches are an option, and in the same time this regex dilemma is interesting by itself
No, it was my fault.. I posted wrong.
By matching (.*document.*), I was capturing the whole expression. If the input was "calendar simple", the
lookahead (.*simple.*) would have nothing left to match.
The correct pattern would be (calendar)(?!.*simple.*). This would return true for "calendar" or 'calendar some words", but false for "calendar simple".
I tested this with the RegexTestHarness in the Sun tutorials.
PS: Now that I think I got how this works, I am trying to combine lookahead with lookbehind
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