rust armanazi refactor flowcontrol match unwrap_or_else
Language: Rust
To refactor flow control using the match
statement in Rust, you can use the unwrap_or_else
method. Here's an example:
fn main() {
let result = Some(5);
let value = match result {
Some(num) => num,
None => {
// Handle the None case here
0
}
};
println!("Value: {}", value);
}
In this example, we have a result
variable of type Option<i32>
. We use the match
statement to handle both the Some
and None
cases. If result
is Some
, we assign the value to the num
variable. If result
is None
, we provide a default value of 0.
The unwrap_or_else
method is used to handle the None
case. It takes a closure as an argument, which is executed when the Option
is None
. In this case, we simply return 0.
Finally, we print the value of value
, which will be either the value from Some
or the default value of 0 if result
is None
.
I hope this helps! Let me know if you have any further questions.