As stated in the previous chapter, compliance with the io.Reader interface requires the implementation of the Read() method, whereas if you want to satisfy the io.Writer interface guidelines, you will need to implement the Write() method. Both these interfaces are very popular in Go and we will put them to use in a little while.
The io.Reader and io.Writer Interfaces
Buffered and unbuffered file input and output
Buffered file input and output happens when there is a buffer for temporarily storing data before reading data or writing data. Thus, instead of reading a file byte by byte, you read many bytes at once. You put the data in a buffer and wait for someone to read it in the desired way. Unbuffered file input and...
