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All of the code from Head First JavaScript is now available, as well as a place where you can practice JavaScript in your browser.
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JavaScript Code and Sandbox
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Looking for source files, code, exercise answers, and other materials to go along with your Head First book? Go to this page, find your book on the list, and click on the title.
Head First iPhone Development, Head First Programming, Head First 2D Geometry, and Head First Data Analysis are now available.
Buy 2 Books, Get the 3rd FREE! Use the discount code OPC10 when you buy direct from O'Reilly.
