Working with Unix pipes

Unix pipes are useful when we are passing the output of one program to the input of another. For example, take a look at the following code:

          $ echo "test case" | wc -l
          

             1
        

In a Go application, the left-hand side of the pipe can be read in using os.Stdin, which acts like a file descriptor. To demonstrate this, this recipe will take an input on the left-hand side of a pipe and return a list of words and their number of occurrences. These words will be tokenized on white space.

How to do it...

These steps cover writing and running your application:

1. From your Terminal or console application,createa new directory called~/projects/go-programming-cookbook/chapter2/pipes.
2. Navigate to this directory.
3. Run the following command:

          $ go mod init github.com/PacktPublishing/Go-Programming-Cookbook-Second-Edition/chapter2...