bytecounter

Overview ¶

Bytecounter shows how to use interfaces. It implements a (concrete) type named ByteCounter whose Write method counts bytes before discarding them. Since ByteCounter satisfies the io.Writer interface (an abstract type), we can pass it to fmt.Fprint.

Adapted from github.com/adonovan/gopl.io/blob/master/ch7/bytecounter.

Level: beginner Topics: interfaces, io.Writer