Learning Functional Programming in Go

Map and filter

The next code example demonstrates the use of a few standard intermediate functions: map and filter.

The code in this example can be copy/pasted into The Go playground, which is a service that takes your Go program, compiles, links, and runs your program with the latest version of Go inside a sandbox and then returns the output to the screen. You can find it at https://play.golang.org/.

Executable commands must always use package main. We can separate each import statement on a separate line for readability.

External packages can be referenced using their remote GitHub repository path. We can preface long package names with a shorter alias. The go_utils package can now be referenced with the u letter. Note that if we aliased ...