Chapter 7: Some confusing terms

📚 Official Books SwiftUI by Tutorials
1

While reading chapter 7, I found out some confusing terms as follows:
1. hierarchical position

  • raise the hierarchical position of the PracticeScore binding
  • want to pass the @State value down the hierarchy
    I really dont understand what “raise/ down & hierarchical position” here means?
  1. underscore (_answered)
    In the end, I still didn’t understand why we need underscore here.

Looking forward to your reply

2

@trungngo Thank you for your questions - much appreciated! I will forward them to the author of the chapter and he will get back to you soon.