Function itertools::merge

pub fn merge<I, J>(i: I, j: J) -> Merge<I::IntoIter, J::IntoIter> where I: IntoIterator, J: IntoIterator<Item=I::Item>, I::Item: PartialOrd

Create an iterator that merges elements in i and j.

IntoIterator enabled version of i.merge(j).

use itertools::merge;

for elt in merge(&[1, 2, 3], &[2, 3, 4]) {
    /* loop body */
}