(?!...). Let's take a look at the following regular expression (T|t)he(?!\sfat) which means: get all The or the words from the input string that are not followed by a space character and the word fat."(T|t)he(?!\sfat)" => The fat cat sat on the mat. ...
" "; string result = Regex.Replace(input, pattern, replacement); Console.WriteLine("Original String: {0}", input); Console.WriteLine("Replacement String: {0}", result); } } // The example displays the following output: // Original String: This is text with far too much white space...
// Replacement String: This is text with far too much white space. 以下示例使用 Replace(String, String, String) 方法将 UNC 路径中的本地计算机和驱动器名称替换为本地文件路径。 正则表达式使用 Environment.MachineName 属性来包括本地计算机的名称,使用 Environment.GetLogicalDrives 方法包括逻辑驱动器的名称...
如果是single-word: '[\w+\]';如果含有space or punctuation: '\[.+]' In[1]:r'\w''\\w'In[2]:'\\w'\wIn[2]:print(r'\n')\nIn[3]:print('\n')#输出了看不见的换行符,而不是字符`\n` 6.Negative Character Class #要java不要javascriptpattern=r'[Jj]ava[^Ss]' \d数字匹配符 dig...
\s matches a whitespace character — that is, a space or tab From what mentioned above, we can write regular expressions like this: \w{5} matches any five-letter word or a five-digit number. a{5} will match “aaaaa”. \d{11} matches an 11-digit number such as a phone number. ...
to indicate negation i.e.(?!...). Let's take a look at the following regular expression(T|t)he(?!\sfat)which means: get allTheorthewords from the input string that are not followed by a space character and the wordfat. "(T|t)he(?!\sfat)" => The fat cat sat onthemat....
#include<string>#include<iostream>#include<algorithm>#include<regex>#include<cstdio>intmain(){using namespace std;regexreg("(http|https)://([\\w\\./]*)");string strIn;std::smatch res;bool isUrl;// 查找getline(cin,strIn);isUrl=std::regex_search(strIn,res,reg,std::regex_constants:...
\D, \S, \W Negated Perl character class Perl character classes (Unicode friendly) These classes are based on the definitions provided in UTS#18: Expand table PatternDescription \d Ddigit (\p{Nd}) \D Not digit \s Whitespace (\p{White_Space}) \S Not whitespace \w Word character (\...
Match zero or more white-space characters. [\+-]? Match zero or one occurrence of either the positive sign or the negative sign. \s? Match zero or one white-space character. \$? Match zero or one occurrence of the dollar sign. ...
Namespace: System.Text.RegularExpressions Assemblies: netstandard.dll, System.Text.RegularExpressions.dll Source: Regex.cs Represents an immutable regular expression. C# Copy public class Regex : System.Runtime.Serialization.ISerializable Inheritance Object Regex Derived System.Web.RegularExpressions.As...