NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"(?<=title\\>).*(?=%@<-",result); } } NSPredicate测试: 其中自定义一个类,出事的时候给属性赋值,用runtime获取所有属性并重写description方法 @interface
What Ireallywanted was to match'ROAD'when it was at the end of the stringandit was its own whole word, not a part of some larger word. To express this in a regular expression, you use\b, which means “a word boundary must occur right here”. In Python, this is complicated by the...
When calling regexprep, pass an additional input that is an expression that specifies a pattern for the replacement. Steps for Building Expressions There are three steps involved in using regular expressions to search text for a particular term: Identify unique patterns in the string This entails...
In fact, the engine must confirm that none of the possible “paths” through the input string match the regex, which means that all paths have to be tested. With a simple non-grouping regular expression, the time spent to confirm negative matches is not a huge problem...
To check whether a stringendswith a specific word or not, we can use the word in the regular expression, followed by the dollar sign. The dollar sign marks the end of the statement. Take a look at the following example: text="1998 was the year when the film titanic was released"ifre...
$_Substitutes the entire input string.B+$_"AABBCC""AAAABBCCCC" Regular Expression Options You can specify options that control how the regular expression engine interprets a regular expression pattern. Many of these options can be specified either inline (in the regular expression pattern) or as...
$in the regular expression pattern. Note that\r?$will include any\rin the match. The following example adds the$anchor to the regular expression pattern used in the example in theStart of String or Linesection. When used with the original input string, which includes five lines of text, ...
Multiple matches are stored as array elements in that object. The following code example shows how to iterate over the matches for a regular expression namedreg1to build a string to display as HTML. JavaScript functioninitDialer(){letmyEntities;letmyString;letmyCell; myEntities = Office.co...
the following example verifies that a string begins and ends with an alphanumeric character, and that any other character in the string is one of a larger subset. It forms a portion of the regular expression used to validate email addresses; for more information, seeHow to: Verify that Stri...
Regular expression support has been in the standard Java runtime for ages and is well integrated (e.g., there are regex methods in the standard class java.lang.String and in the “new I/O” package). There are a few other regex packages for Java, and you may occasionally encounter ...