exercism/rust/health-statistics/HINTS.md

Hints

General

1. Implement the new() method

• The new() method receives the arguments we want to instantiate a User instance with. It should return an instance of User with the specified name, age, and weight.

• See here for additional examples on defining and instantiating structs.

2. Implement the getter methods

• The name(), age(), and weight() methods are getters. In other words, they are responsible for returning the corresponding field from a struct instance.

• Notice that the name method returns a &str when the name field on the User struct is a String. How can we get &str and String to play nice with each other?

• There's no need to use a return statement in Rust unless you expressly want a function or method to return early. Otherwise, it's more idiomatic to utilize an implicit return by omitting the semicolon for the result we want a function or method to return. It's not wrong to use an explicit return, but it's cleaner to take advantage of implicit returns where possible.

fn foo() -> i32 {
    1
}

• See here for some more examples of defining methods on structs.

3. Implement the setter methods

• The set_age() and set_weight() methods are setters, responsible for updating the corresponding field on a struct instance with the input argument.

• As the signatures of these methods specify, the setter methods shouldn't return anything.