Learning Functional Programming in Go

An imperative versus pure FP example

Suppose we start with a slice of ints, ints := []int{1,2,3}.

In imperative programming, we write all the scaffold code to implement exactly how to process this slice of ints. In pure FP, however, we tell our functor what we want the loop to do:

Here's the output:

imperative loop: [2 3 4]fp map: [2 3 4]

Let's see how this works.