rustHow to filter a vector in Rust

To filter a vector in Rust, you can use the filter() method. This method takes a closure as an argument and returns a new vector with only the elements that satisfy the closure's condition. For example, to filter a vector of numbers and keep only the even numbers:

let numbers = vec![1, 2, 3, 4, 5];
let even_numbers: Vec<i32> = numbers.into_iter().filter(|x| x % 2 == 0).collect();
// even_numbers is now [2, 4]

The filter() method iterates over the vector and applies the closure to each element. If the closure returns true, the element is kept in the new vector, otherwise it is discarded. In the example above, the closure checks if the number is even and returns true if it is.

Helpful links

• Rust Documentation - Iterator::filter
• Rust by Example - Iterators
• Rust Cookbook - Filter a Vector

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