一、Character Classes 字符类 1、[abc]Character Set 匹配a 或 b 或 c 字符 2、[^abc]Negated Character Set 匹配除 abc 之外的字符 3、[a-z]Range 匹配abcde..xyz 之中的任意字符 4、.Dot 匹配除开换行符之外的所有字符 5、\wWord ;\WNot Word \w匹配数字、字母、下划线 \W匹配除开数字、字母、...
as the end of the string. `S/DOTALL` "." matches any character at all, including the newline. `X/VERBOSE` Ignore whitespace and comments for nicer looking RE's. `U/UNICODE` Make \w, \W, \b, \B, dependent on the Unicode locale. 6.2,match 方法 re.match尝试从字符串的起始位置开始...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { // Get drives available on local computer and form into a single character expression. string[] drives = Environment.GetLogicalDrives(); string driveNames = String.Empty; foreach (string dr...
(?i:" + Environment.MachineName + ") Perform a case-insensitive match of the string that is returned by the Environment.MachineName property. (?:\.\w+)* Match the period (.) character followed by one or more word characters. This match can occur zero or more times. The matched subexp...
The regular expression is matched against an input string by comparing each character in the regular expression to each character in the input string, one after another. Regular expressions are normally case-sensitive so the regular expression The would not match the string the. "The" => The ...
Because in the string abc, the "b" is not the starting character. Let's take a look at another regular expression ^(T|t)he which means: an uppercase T or a lowercase t must be the first character in the string, followed by a lowercase h, followed by a lowercase e."(T|t)he" ...
/i ignore case /g match globally (all) /m let ^ and $ match next to embedded \n /s let . match \n /x ignore most whitespace and allow comments /e evaluate right-hand side of s/// as an expression Binding operators charactermeaning =~ TRUE if the regex matches !~ TRUE if the ...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { // Get drives available on local computer and form into a single character expression. string[] drives = Environment.GetLogicalDrives(); string driveNames = String.Empty; foreach (string drive ...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { // Get drives available on local computer and form into a single character expression. string[] drives = Environment.GetLogicalDrives(); string driveNames = String.Empty; foreach (string drive ...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { // Get drives available on local computer and form into a single character expression. string[] drives = Environment.GetLogicalDrives(); string driveNames = String.Empty; foreach (string drive ...