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class and instance?

 
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I'm just want to know if what's the difference of class methods and instance method? When to use class methods or instance methods?
thanks!

raymond
 
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Use instance methods if the result or side-effects depend on the state or contents of the object. Use class methods if the result depends only on its arguments or on other "static" data.
 
raymond yadao
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Originally posted by Frank Carver:
Use instance methods if the result or side-effects depend on the state or contents of the object. Use class methods if the result depends only on its arguments or on other "static" data.


can you elaborate further or give an examples?
raymond
 
Frank Carver
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OK.
 
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