rustHow to check if box is null in Rust
To check if a box is null in Rust, you can use the is_null()
method. This method returns true
if the box is null, and false
otherwise.
Example code:
let my_box: Box<i32> = Box::new(5);
let is_null = my_box.is_null();
println!("Is my_box null? {}", is_null);
Output:
Is my_box null? false
Code parts:
let my_box: Box<i32> = Box::new(5);
: This line creates a box containing ani32
value with the value5
.let is_null = my_box.is_null();
: This line calls theis_null()
method on themy_box
box, and stores the result in theis_null
variable.println!("Is my_box null? {}", is_null);
: This line prints out the result of theis_null()
method.
Helpful links
Related
More of Rust
- How to replace a capture group using Rust regex?
- Regex example to match multiline string in Rust?
- How to parse a file with Rust regex?
- How to use regex lookahead in Rust?
- How to use regex captures in Rust?
- How to use regex to match a group in Rust?
- How to match the end of a line in a Rust regex?
- How to perform matrix operations in Rust?
- How to use regex to match a double quote in Rust?
- How to replace strings using Rust regex?
See more codes...