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Is there a story behind the name ''duck typing'', I've heard ''if it looks like a duck, and sounds like a duck, let's call it a duck'' (or something like that), but why a duck? Why not ``if it looks like a _ and sounds like a _, let's call it a _''.
It sounds like a Flying Circus sketch, but I don't remember it. Is there a story behind the name?
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Duck typing in computer programming is an application of the duck test—"If it walks like a duck and it quacks like a duck, then it must be a duck"—to determine whether an object can be used for a particular purpose.
With duck typing you can introduce subtle bugs in your code due this lack of formal relationship. If your "quack" isn't a "quack" at all, you'll be in trouble. With inheritance, this is less likely to happen due the contractual nature of subclassing abstract classes.
The term Duck Typing is a lie.
Duck Typing is a way of programming in which an object passed into a function or method supports all method signatures and attributes expected of that object at run time. The object's type itself is not important. Rather, the object should support all methods/attributes called on it.
Duck typing is a phrase borrowed from the much older "walk like a duck". The latter has been around far longer than the programming idea it describes. See answerbag.com
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http://groups.google.com/group/comp.lang.python/msg/e230ca916be58835?hl=en&
Alex is involved... ;)
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