pub fn iterate<St, F>(initial_value: St, f: F) -> Iterate<St, F>ⓘNotable traits for Iterate<St, F>impl<St, F> Iterator for Iterate<St, F> where
F: for<'_> FnMut(&St) -> St, type Item = St; where
F: for<'_> FnMut(&St) -> St, Expand description
Creates a new iterator that infinitely applies function to value and yields results.
use itertools::iterate;
itertools::assert_equal(iterate(1, |&i| i * 3).take(5), vec![1, 3, 9, 27, 81]);