Function boxchop::new_with

pub fn new_with<T>(len: usize, gen: impl FnMut(usize) -> T) -> Box<[T]>

Creates a boxed slice of len elements using the closure gen to generate each element, given the element's index.

Example

let nums = new_with(5, |x| x + 1);

assert_eq!(
    nums,
    Box::from([1, 2, 3, 4, 5])
);