Learning Functional Programming in Go

Interface composition

Much like a writer composes a book from a set of chapters or a chapter from a set of sections, as Go programmers, we can compose our software applications using functional composition.

We can take the functional composition approach to design a software solution that enables us to design complex APIs from a set of smaller ones.

For example, in the Viva La Duck example from the previous chapter, we composed the SurvivalBehaviors interface from two smaller ones:

type SurvivalBehaviors interface {       StrokeBehavior       EatBehavior}

Nothing is difficult. Complex things are simply built upon smaller, simpler things! When we approach ...