remove on condtion in vec rust

To remove an element from a Rust vector based on a condition, you can use the retain method. This method retains only the elements that satisfy a given condition, effectively removing the elements that do not meet the condition.

Here's an example of how you can remove elements from a vector based on a condition:

fn main() {
    let mut vec = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

    vec.retain(|&x| x % 2 == 0); // Remove odd numbers from the vector

    println!("{:?}", vec); // Output: [2, 4, 6, 8, 10]
}

In this example, the retain method is called on the vector vec. The closure |&x| x % 2 == 0 is passed to retain, which checks if each element of the vector is divisible by 2 (i.e., even). If an element satisfies the condition, it is retained in the vector. Otherwise, it is removed.

After calling retain, the vector vec will only contain the even numbers, resulting in the output [2, 4, 6, 8, 10].

I hope this helps! Let me know if you have any further questions.