BlackBeans questions

BlackBeans answers

• replace impl trait return type with trait bound
• How to ensure trait bounds within a trait?
• Why should/shoudn't I use lib.rs in binary crates? [closed]
• Useful monads for multi-paradigm languages
• Why is this borrow considered to be "used later" even though it clearly isn't?
• Why does &str::from(...) not create a String?
• How to create and drop a shared resource for tests?
• rust struct fields generating by macro
• Random function does not return random values
• Is there any way to mitigate a 'borrow may still be in use when generator yields' error in nested generators by using lifetimes?