Can you explain Go Interfaces?

Question

I dont get the whole types + Interfaces model(that replaces classes in other languages). If theres a simple way you could explain what they are about, it will be really appreciated.

Can you explain Go Interfaces? Decouple code. See https://stackoverflow.com/a/62297796/12817546. Call a method “dynamically”. See https://stackoverflow.com/a/62336440/12817546. Access a Go package. See https://stackoverflow.com/a/62278078/12817546. Assign any value to a variable. See https://stackoverflow.com/a/62337836/12817546. — , Jul 10 '20 at 09:54

score 5 · Answer 1 · answered Oct 11 '11 at 05:52

5

This is a pretty good overview:

http://research.swtch.com/2009/12/go-data-structures-interfaces.html

answered Oct 11 '11 at 05:52

Chris Cherry

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score 4 · Accepted Answer · answered Oct 11 '11 at 07:31

Go interfaces are statically checked duck typing.

The difference between pure virtual classes in C++ or interfaces in java is that you don't declare the interface on the class that implements the interface, but on the method that receives the interface.

For example, I can create an interface with a Read and a Write method and call it ThingsDustinReadsAndWrites and have a function called doReadsAndWrites(rr ThingsDustinReadsAndWrites. That can, in turn, receive a built-in http.ClientConn which has never heard of my interface, but implements it because it happens to have those methods.

Can you explain Go Interfaces?

2 Answers2