Learning Functional Programming in Go

How to run our first Go application

First, let's make sure we have Go installed, our GOPATH is properly set, and that we can run a Go application.

If you are using a macOS, then check out the instructions on how to use the brew command to install Go in the appendix; otherwise, to install Go, visit: http://golang.org/doc/install. To set your GOPATH, visit: https://github.com/golang/go/wiki/SettingGOPATH.

Many people use a global GOPATH to store the source code for all their Go applications or, frequently, manually reset their GOPATH. I found this practice to be troublesome when working with multiple Go projects for multiple clients, each of which had differing Go versions and third-party dependencies.

The example Go applications that we'll ...