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Subject:
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Need help with inheritance
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Posted By:
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filip
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Post Date:
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8/17/2006 8:32:26 AM
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Hi!
On page 108, you write "this.newMethod = ClassA;"
However, on page 109, you write "ClassB.prototype = new ClassA();"
Could you please explain why you have the new keyword in the second case, and no new keyword in the first place.
Please help help help
Thanks :)
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Reply By:
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nzakas
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Reply Date:
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8/25/2006 9:38:47 PM
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Filip,
The "new" operator is used to instantiate an instance of an object. So "new ClassA()" creates a new object of the type ClassA. Without "new", ClassA is just a pointer to a function.
Nicholas C. Zakas
Author, Professional JavaScript for Web Developers (ISBN 0764579088)
http://www.nczonline.net/
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