Function all

pub fn all<I, F>(iterable: I, f: F) -> bool
where
    I: IntoIterator,
    F: FnMut(<I as IntoIterator>::Item) -> bool,

Available on crate feature dep_itertools only.

Test whether the predicate holds for all elements in the iterable.

IntoIterator enabled version of Iterator::all.

use itertools::all;

assert!(all(&[1, 2, 3], |elt| *elt > 0));