; var regexp = /(\d) \//; // find a digit followed by a space followed by a slash. To save the digit also, enclose between parenthesis var arr = str.match (regexp); // returns an array of matches, match[0] = digit-space-slash, match[1] = capture group,...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string input = "This is text with far too much " + "white space."; string pattern = "\\s+"; string replacement = " "; string result = Regex.Replace(input, pattern, replacement); Co...
Namespace: System.Text.RegularExpressions Assembly: System.Text.RegularExpressions.dll Indicates whether the regular expression finds a match in the input string. Overloads Expand table IsMatch(String, String, RegexOptions, TimeSpan) Indicates whether the specified regular expression finds a match in the...
. 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. Test the regular ...
Split at each white-space character: importre txt ="The rain in Spain" x = re.split("\s",txt) print(x) Try it Yourself » You can control the number of occurrences by specifying themaxsplitparameter: Example Split the string only at the first occurrence: ...
{gc=Decimal_Number\p{IsHex_Digit}]}}A whitespace character: \p{IsWhite_Space}<\p{XDigitPOSIX 兼容表达式See Unicode documentation java.lang.Character classes (简单 java 字符类型)
(?!...). Let's take a look at the following regular expression [T|t]he(?!\sfat) which means: get all The or the words from input string that are not followed by the word fat precedes by a space character."[T|t]he(?!\sfat)" => The fat cat sat on the mat. ...
character i.e.(?!...). Let's take a look at the following regular expression(T|t)he(?!\sfat)which means: get allTheorthewords from input string that are not followed by the wordfatprecedes by a space character. "(T|t)he(?!\sfat)" => The fat cat sat onthemat....
implements bounded repetitions by macro expansion, which is costly in time and space if counts are large or bounded repetitions are nested. An RE like, say, .Ql "(((a{1,100}){1,100}){1,100}){1,100}){1,100}" will (eventually) run almost any existing machine out of swap space...
A regular expression is a "prefix expression" if it starts with a caret (^) or a left anchor (\A), followed by a string of simple symbols. For example, the regex /^abc.*/ will be optimized by matching only against the values from the index that start with abc. Additionally, while...