July 2017
Intermediate to advanced
158 pages
3h 41m
English
Content preview from Java 9 Regular Expressions
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Positive lookahead
A positive lookahead assertion asserts true if the pattern inside the lookahead is matched.
The following is its syntax:
(?=...)
For example, \d+(?=##) asserts that there must be a string, ##, immediately after matching one or more digits.
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