Rework sublist to use windows

rust/sublist/src/lib.rs

@@ -8,13 +8,7 @@ pub enum Comparison {
 
 pub fn sublist<T: PartialEq>(first: &[T], second: &[T]) -> Comparison {
     let is_sublist = |first: &[_], second: &[_]| {
-        second
+        first.is_empty() || second.windows(first.len()).any(|window| first == window)
-            .iter()
-            .enumerate()
-            .map(|(i, _)| &second[i..])
-            .take_while(|suffix| first.len() <= suffix.len())
-            .map(|suffix| &suffix[..first.len()])
-            .any(|sublist| first == sublist)
     };
     if first == second {
         Comparison::Equal