Functional Options in Go

This example Go program makes use of the "Functional Options" pattern to create and initialize a structure with options. So instead of:

myStuct := &MyStruct{
  Field1: default1
  Field2: default2
}
//user options
myString.Field1 := option1
myString.Field2 := option2

we can follow this pattern:

myStruct := NewMyStruct(
    WithOption(option1),
    WithOption(option2),
    )

Links

• https://www.sohamkamani.com/golang/options-pattern/#:~:text=%20Functional%20Options%20in%20Go%3A%20Implementing%20the%20Options,Functional%20Options%20to%20our%20Constructor.%20The...%20More%20

git setup

• create github project
  • https://github.com/illianov/go-funcopts
• create top level dev directory locally
  • mkdir /d/dev/github.com/illianov/go-funcopts
  • cd /d/dev/github.com/illianov/go-funcopts
• initialize git
  • git init
  • git branch -M main
  • git remote add origin git@github.com:illianov/go-funcopts.git
• add readme.md
  • git add README.md
  • git commit -m "adding readme.md"
  • git push -u origin main
• update readme.md
  • git commit -m "updating readme.md"
  • git push origin main