[−][src]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();