Advanced ActionScript 3 with Design Patterns

Chapter 16. Regular Expressions

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• Introducing the RegExp Class 252

• Working with Regular Expressions 252

• Using Regular Expression Flags 255

• Understanding Metacharacters and Metasequences 258

• Using Regular Expression groups 261

• Building a Mad Libs Application Using Regular Expressions 263

• Summary 272

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Regular expressions enable you to look for substrings that match a pattern, making them a powerful way to work with strings. For basic substring searches, you can use String class methods such as indexOf(). Methods such as indexOf() work when you know the exact substring you want to find. For example, if you want to determine whether a string contains the substring cog you can use the following code:

var string:String ...