In this chapter, we introduced the concept of streams for describing incoming and outgoing flows of data. We saw that the reader interface represents the data received, while the writer is the sent data.
We compared the different readers that are available in the standard package. We looked at files in the previous chapter, and in this one we added byte and string readers to the list. We learned how to implement custom readers with an example, and saw that it's always good to design a reader to be built on top of another.
Then, we focused on writers. We discovered that files are also writers if opened correctly and that there are several writers in the standard package, including the byte buffer and the string builder. We also implemented a custom writer and saw how to handle bytes and runes with the utf8 package.
Finally, we explored the remaining functionality...
