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31 lines
1.5 KiB
31 lines
1.5 KiB
3 years ago
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# Hints
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## General
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## 1. Implement the `new()` method
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- 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.
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- See [here](https://doc.rust-lang.org/book/ch05-01-defining-structs.html) for additional examples on defining and instantiating structs.
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## 2. Implement the getter methods
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- The `name()`, `age()`, and `weight()` methods are getters. In other words, they are responsible for returning the corresponding field from a struct instance.
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- 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?
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- 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.
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```rust
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fn foo() -> i32 {
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1
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}
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```
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- See [here](https://doc.rust-lang.org/book/ch05-03-method-syntax.html) for some more examples of defining methods on structs.
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## 3. Implement the setter methods
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- The `set_age()` and `set_weight()` methods are setters, responsible for updating the corresponding field on a struct instance with the input argument.
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- As the signatures of these methods specify, the setter methods shouldn't return anything.
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