在第一规则OneOrMore作用是,使用贪婪匹配会匹配所有字符串直到数字4,留下最后的数字2满足第二规则OneOrMore(.digit),并被捕获为结果。所以输出结果为2。 如果改变第一规则为懒惰匹配: letregex=Regex{OneOrMore(.any,.reluctant)Capture(OneOrMore(.digit))}letline="hello world 99 ---> 42"ifletmatch=lin...
In the following example, the regular expression /d+ is used to split an input string that includes one or more decimal digits into a maximum of three substrings. Because the beginning of the input string matches the regular expression pattern, the first array element contains String.Empty, ...
This pattern can be matched either zero or one time. (\d+\.?((?<=\.)\d+)?) Match the pattern of one or more decimal digits followed by an optional period and additional decimal digits. This is the second capturing group. The call to the Replace(String, String) method replaces the...
0dd An octal character code, where dd is one or more octal digits. \xXX 0xXX A hexadecimal character code, where XX is one or more hexadecimal digits. \x{XX} 0xXX A hexadecimal character code, where XX is one or more hexadecimal digits, optionally a Unicode character. \cZ z-@ An A...
Group 2 ([\da-z\.-]+) - Next, the domain name must be matched which can use one or more digits, letters between a-z, periods, and hyphens. The domain name is then followed by a period \.. Group 3 ([a-z\.]{2,5}) - Lastly, the third group matches the top level domain....
We could re-write this regex in pseudo-English as [start of line][one or more digits][end of line]. Pretty simple right? We could replace [0-9] with \d, which will do the same thing (match any digit). The great thing about this expression (and regular expressions in general) is...
For example, a regex that captures one or more digits after anything else using eager matching: let regex = Regex { OneOrMore(.any, .eager) Capture(OneOrMore(.digit)) } let line = "hello world 99 ---> 42" if let match = line.wholeMatch(of: regex) { let count = match.1 //...
A REGEX pattern can also contain groups enclosed by parentheses “( )”. Groups can be used to capture parts of the matched text, or to apply quantifiers or modifiers to the whole group. For example, “(ab)+” matches one or more occurrences of “ab”, and “(\d{3})-(\d{4})”...
Match zero or one occurrence of a period (used as a decimal separator character). ((?<=\.)\d+)? If a period is the previous character, match one or more decimal digits. This pattern can be matched either zero or one time.
For instance, [0-5]+ translates to “find one or more digits”, rather than just a single digit in the range from zero to five. After this rather lengthy intro on the VBA RegEx syntax essentials, let’s now turn to the VBA RegEx setup! VBA RegEx function Start by opening the Visual...