programming languages - What is duck typing?

Question

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

I came across the term duck typing while reading random topics on software online and did not completely understand it.

What is “duck typing”?

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1 Answer

深蓝 · Answer 1 · 2021-10-16T21:21:39+0000

It is a term used in dynamic languages that do not have strong typing.

The idea is that you don't need a type in order to invoke an existing method on an object - if a method is defined on it, you can invoke it.

The name comes from the phrase "If it looks like a duck and quacks like a duck, it's a duck".

Wikipedia has much more information.