Learning Functional Programming in Go

More cars

It's time to add more cars:

moreCars := LoadMoreCars()PrintCars("More Cars, Domestic, Numeric, GM",       cars.AddCars(moreCars).              Filter(ByDomestic()).              Filter(ByHasNumber()).              Filter(ByMake("GM")))

The output of this is as follows:

More Cars, Domestic, Numeric, GM-----------------------car: GM Hummer H2car: GM Hummer H3car: GM Oldsmobile Delta 88car: GM Oldsmobile 442

Wait, what? AddCars? How is that an HOF? AddCars neither takes a function nor returns a function. Even worse, it mutates the cars collection.