Learning Functional Programming in Go

Testing our empty interface-based Map function

We'll test our new empty interface-based Map function by defining a transformation function. This function will multiply every item in the collection by 10:

func main() {     transformation10 := func(curVal, _, _ Object) Object {     return curVal.(int) * 10 }     result := Map(Collection{1, 2, 3, 4}, transformation10)     fmt.Printf("result: %vn", result)

We pass a collection of the numbers 1, 2, 3, and 4 as well as the transformation function.

The output will be as follows:

result: [10 20 30 40]

Now, let's pass our Map function a collection of strings:

     transformationUpper := func(curVal, _, _ Object) Object { return strings.ToUpper(curVal.(string)) } result = Map(Collection{"alice", "bob", "cindy"}, transformationUpper) ...