Learning Functional Programming in Go

Monads allow us to chain continuations

Chaining continuations means that we can execute a series of functions, where the output of one function is the input of the next. Check out the following example of chaining high-order functions:  

cars := LoadCars()for _, car := range cars.Filter(ByHasNumber()).       Filter(ByForeign()).       Map(Upgrade()).       Reduce(JsonReducer(cars), Collection{}) {       log.Println(car)}

You will see the following output:

{"car": {"make": "Honda", "model": " Accord ES2 LX"}}{"car": {"make": "Lexus", "model": " IS250 LS"}}{"car": {"make": "Lexus", "model": " SC 430 LS"}}{"car": {"make": "Toyota", "model": " RAV4 EV"}}

How much more code would be required if we were to implement the for loops, error checking, and other scaffolding ...