Function array_init::array_init

pub fn array_init<Array, F>(initializer: F) -> Array where
    Array: IsArray,
    F: FnMut(usize) -> Array::Item, 

Initialize an array given an initializer expression

The initializer is given the index of the element. It is allowed to mutate external state; we will always initialize the elements in order.

If your initializer panics, any elements that have been initialized will be leaked.

Examples

// Initialize an array of length 10 containing
// successive squares

let arr: [u32; 50] = array_init::array_init(|i| (i*i) as u32);

// Initialize an array from an iterator
// producing an array of [1,2,3,4] repeated

let four = [1u32,2,3,4];
let mut iter = four.iter().cloned().cycle();
let arr: [u32; 50] = array_init::from_iter(iter).unwrap();