Rust Options Some None using closures

In Rust, the Option type is used to represent the presence or absence of a value. It is commonly used to handle situations where a value may or may not be present. The Option type has two variants: Some and None.

The Some variant is used to wrap a value and indicate that it is present. The None variant is used to indicate the absence of a value.

Closures in Rust can be used with Option to handle different scenarios. For example, you can use closures with Option to perform operations on the wrapped value if it is Some, or handle the absence of a value if it is None.

Here's an example of how you can use closures with Option in Rust:

fn main() {
    let value: Option<i32> = Some(5);

    // Using a closure to perform an operation on the wrapped value
    value.map(|x| x * 2).map(|x| println!("Doubled value: {}", x));

    let absent_value: Option<i32> = None;

    // Using a closure to handle the absence of a value
    absent_value.map(|x| x * 2).map(|x| println!("This won't be printed"));
}

In the example above, the closure |x| x * 2 is used with the map method to double the value if it is Some. If the value is None, the closure is not executed.

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