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 of structs in Rust
- Example of struct private field in Rust
- How to init zero struct in Rust
- How to serialize struct to xml in Rust
- Example of Rust struct with closure
- How to get struct value in Rust
- Example of bit field in Rust struct
- Rust struct without fields
- How to convert struct to protobuf in Rust
More of Rust
- How to replace a capture group using Rust regex?
- How to calculate the sum of a Rust slice?
- How do I create an array of strings in Rust?
- How to replace all matches using Rust regex?
- How to use regex to match a double quote in Rust?
- Hashshet example in Rust
- How to use regex captures in Rust?
- How to convert JSON to a struct in Rust?
- How to pop an element from a Rust HashMap?
- How to convert a Rust HashMap to a JSON string?
See more codes...