Like the exercise from the last lecture, this exercise involves solving a couple of katas related to the lecture. Additionally, it explores the options builder pattern.
You can run the code using the main package in cmd/katas.
In this section, you will explore the "options builder pattern" commonly used in idiomatic Go code.
The internal/pizza directory contains an imlementation of a traditional builder pattern as you know it. Your goal is to rewrite it using the options pattern. This pattern replaces the traditional method chaining on a builder type with supplying a set of functions to the constructor that then modify the structure.
To give you a hint:
func New(options ...Option) MyType {
// construct type
}func WithSomeOption(args) Option {
return func(t *MyType) {
// modify type
}
}If you feel lost or do not know how to go about it, Google it or check this blog directly.
The module also includes a couple of katas in the internal/katas directory. The katas also contain auxilery functions, type, and data in the subdirectories which you are free to explore, but should not edit in any way. Each kata contains a brief description of the problem which should be fixed.