rustWhen to use borrow in Rust
Borrowing in Rust is a way to temporarily take ownership of a value without taking ownership of it permanently. It is used when you want to use a value without taking ownership of it, such as when passing a value to a function.
Example:
let mut x = 5;
let y = &x;
println!("x = {}", x);
println!("y = {}", y);
Output example
x = 5
y = 5
In this example, x
is a mutable variable with the value of 5. y
is a reference to x
, which means that y
borrows the value of x
without taking ownership of it. y
can be used to access the value of x
, but x
still owns the value and can be modified.
The main benefit of borrowing is that it allows you to use a value without taking ownership of it, which can be useful in many situations. For example, when passing a value to a function, you can borrow the value instead of taking ownership of it.
List of ## Code explanation
let mut x = 5;
- This line declares a mutable variablex
with the value of 5.let y = &x;
- This line declares a reference tox
, which means thaty
borrows the value ofx
without taking ownership of it.println!("x = {}", x);
- This line prints the value ofx
to the console.println!("y = {}", y);
- This line prints the value ofy
to the console.
Helpful links
Related
- How to borrow with lifetime in Rust
- How to borrow option value in Rust
- How to borrow from iterator in Rust
- How to borrow struct field in Rust
- How to borrow as static in Rust
- How to borrow vector element in Rust
- Example of borrow_mut in Rust
- How to borrow hashmap in Rust
- How to borrow moved value in Rust
More of Rust
- How to use Unicode in a regex in Rust?
- How to replace a capture group using Rust regex?
- How to replace all matches using Rust regex?
- How to use regex with bytes in Rust?
- How to split a string with Rust regex?
- How to match the end of a line in a Rust regex?
- How to extract data with regex in Rust?
- How to parse JSON string in Rust?
- How to use regex lookahead in Rust?
- How to create a HashSet from a Vec in Rust?
See more codes...