July 2014
Beginner to intermediate
552 pages
18h 28m
English
Content preview from Visual QuickStart Guide: JavaScript, Ninth Edition
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7. Forms and Regular Expressions
In This Chapter
Validating an Email Address with Regular Expressions
Formatting and Sorting Strings
Regular expressions are an amazingly powerful way to validate and format text strings. Using regular expressions, you can write a line or two of JavaScript code that can accomplish tasks that otherwise would have taken several dozen lines.
A regular expression (often abbreviated as RegExp or called by its synonym grep) is a pattern—written using special symbols—that describes one or more text strings. You use regular expressions to match patterns of text so that your script ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.