7 Useful io.Reader and io.Writer Wrappers in Go

Whenever I think about Go in comparison to other programming languages, the first thing that comes to my mind is how Go simplifies the concepts around concurrency and writing concurrent programs.

After all, concurrency is one of the features touted on the homepage:

Built-in concurrency and a robust standard library

But there is something else that Go simplifies and makes it very easy to wrap one’s head around.

The type system.

For anyone who is reaching for your pitch and fork, hear me out.

Take io.Reader as an example. Anything that is an io.Reader can be read from using the Read method. And, all the utilities built around io.Reader will work with anything that complies with the specifications of an io.Reader: not just what has been built but what will be built in the future as well.

And that is why you can create custom wrapper types for io.Reader and io.Writer that are themselves io.Reader and io.Writer to do all sorts of useful things.

In this blog post I will share 7 useful io.Reader and io.Writer wrappers that I found useful in the Go projects that I have worked on.

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