String Manipulation
Many Web sites ask for a visitor’s e-mail address when he wishes to communicate with the site; obviously, this gives the site administrator a chance to respond to questions, comments, and problems. But what happens if the user mistypes his e-mail address? The site administrator has no way to respond, which may make the visitor angry because, without a response, it may appear that the person or company behind the site doesn’t care.
E-mail address verification is one of the several types of string manipulation this chapter covers. Other types include joining strings, dissecting strings, and string replacements.
This chapter teaches you the following:
How to join strings
How to split strings
How to extract a substring from a string
How to use numeric string indexes
How to replace a string within a string
How to use regular expressions for complex string manipulation