Here is mastering Lookahead and lookbehind The simple translation of the article, this article is in their own search questions StackOverflow answer questions on the recommendation of the people, read it to write very well. Here the simple
SummaryJ2SE 1.4 added the assertion function in JAVA. In the simplest case, a Boolean expression can be written to any row in the JAVA code. If the expression is true, add the assert keyword at the beginning of the line of code, the Code continues
Regular expression 0-wide assertion:
0-wide assertion is a difficult point in regular expressions, so this chapter focuses on the analysis of the matching principle. The 0-wide assertion also has other names, such as "Look Around" or "pre-search,"
Copyright NOTICE: This article for Bo Master original article, reprint please accompany the original URL http://www.cnblogs.com/wbchanblog/p/7411750.html, thank you!Tip: This article is mainly about the 0 wide assertion, so reading this article
Detailed explanation of the assertion of the regular expression zero-width, and assertion of the Regular Expression
Assertion with zero width is a method in regular expressions. in computer science, a regular expression is a single string used to
We often use regular expressions to detect a string containing a substring, to indicate that a string does not contain a single character or some character is also very easy to use [^ ...] The form is ready. However, to indicate that a string does
0-width assertion means (the matching width is zero and certain conditions/assertion are met) I do not know that this word was invented by the bastard. It is just too easy.
The zero-width assertion is used to find the anchor before or after some
Nameless, well-known group (1) Regular expression-nameless groupStarting from the left side of the regular expression, the first opening parenthesis "(" represents the first grouping, the second represents the second grouping, and so on.It is
To find a regular expression, a negative 0-wide assertion is required
Content
1234567890234123789
I just want to match the content that is not inside, that needs to match to
7890234123789
The following is my own writing of the regular, but did not
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