Chapter 10. Strings and Regular Expressions
There was a time when people thought of computers exclusively as manipulating numeric values. Early computers were first used to calculate missile trajectories, and programming was taught in the math department of major universities.
Today, most programs are concerned more with strings of characters than with strings of numbers. Typically these strings are used for word processing, document manipulation, and creation of web pages.
C# provides built-in support for a fully functional
string type. More importantly, C# treats strings
as objects that encapsulate all the manipulation, sorting, and
searching methods normally applied to strings of characters.
Complex string manipulation and pattern matching is aided by the use of regular expressions. C# combines the power and complexity of regular expression syntax, originally found only in string manipulation languages such as awk and Perl, with a fully object-oriented design.
In this chapter, you will learn to work with the C#
string type and the .NET Framework
System.String class that it aliases. You will see
how to extract substrings, manipulate and concatenate strings, and
build new strings with the
StringBuilder class. In
addition, you will learn how to use the
class to match strings based on complex regular expressions.
C# treats strings
as first-class types that are flexible, powerful, and easy to use.
string object is an
immutable sequence of Unicode characters. In other ...