[Tutor] When to use classes

[Alan Gauld]

On 19/08/17 17:00, boB Stepp wrote:

> I try to keep this in mind.  Another thing I'm currently struggling
> with is when to use inheritance vs. separate, independent classes.

The golden rule is if the child is not a kind-of the parent then
it should be delegation not inheritance. Never use inheritance as
a mechanism for construction, its for specializing types.

Another anti-pattern to look out for is if you are adding a lot
of new methods rather than overriding inherited methods there's
a good chance you are going the wrong way.

-- 
Alan G
Author of the Learn to Program web site
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