rustHow to update struct in Rust
Updating a struct in Rust is a simple process. To do so, you must first create a mutable reference to the struct. Then, you can use the dot notation to access and update the fields of the struct.
struct Person {
name: String,
age: u8
}
fn main() {
let mut person = Person {
name: String::from("John"),
age: 30
};
person.age = 31;
println!("{} is now {} years old", person.name, person.age);
}
Output example
John is now 31 years old
Code explanation
-
struct Person { name: String, age: u8 }
- This is the definition of thePerson
struct, which contains two fields:name
of typeString
andage
of typeu8
. -
let mut person = Person { name: String::from("John"), age: 30 }
- This creates a mutable reference to aPerson
struct with the nameJohn
and age30
. -
person.age = 31
- This updates theage
field of theperson
struct to31
. -
println!("{} is now {} years old", person.name, person.age)
- This prints out the updated age of theperson
struct.
Helpful links
Related
- Example of struct private field in Rust
- Example of struct of structs in Rust
- How to init zero struct in Rust
- Example of Rust struct with closure
- How to set default value in Rust struct
- Rust struct without fields
- Example of struct with vector field in Rust
- How to pretty print a struct in Rust
- Example of struct public field in Rust
More of Rust
- How to replace a capture group using Rust regex?
- How to split a string with Rust regex?
- How to replace all matches using Rust regex?
- How to replace strings using Rust regex?
- Regex example to match multiline string in Rust?
- How to get an element from a HashSet in Rust?
- How to insert an element into a Rust HashMap if it does not already exist?
- Example of struct private field in Rust
- Hashshet example in Rust
- How to use regex lookahead in Rust?
See more codes...