Day: November 14, 2005

Regular Expressions in C# – Quantifiers and Delegates In this tutorial you will learn about Quantifiers, Grouping constructs, Backreferences, Backreference Constructs, Alternation Constructs, Miscellaneous Constructs, System.Text.RegularExpressions Namespace, Delegates in the namespace System.Text.RegularExpressions and Typical Examples of Regular Expressions. Quantifiers Quantifiers add optional quantity data to a regular expression. A quantifier expression applies to the character, group, or character class that immediately precedes it. Quantifier Description * Specifies zero or more matches; for example, \w* or (abc)* + Specifies one or more matches; for example, \w+ or (abc)+ ? Specifies zero… Read More

Regular Expressions and C#, .NET This Article explores the concept of Regular Expressions in the context of C#, .NET support for Regular Expressions, Meta-characters and their Description, Character Escapes, Substitutions, Character Classes, Regular Expression Options and Atomic Zero-Width Assertions. What are regular expressions? Regular expressions are Patterns that can be used to match strings. You can call it a formula for matching strings that follow some pattern. Regular expression(s) can be considered as a Language, which is designed to manipulate text. You can then ask questions such as “Does the… Read More