September 2017 Update

Task/Sort-stability/Rust/sort-stability.rust

@@ -0,0 +1,28 @@
+fn main() {
+    let country_city = vec![("UK", "London"),
+                            ("US", "New York"),
+                            ("US", "Birmingham"),
+                            ("UK", "Birmingham")];
+
+    let mut city_sorted = country_city.clone();
+    city_sorted.sort_by_key(|k| k.1);
+
+    let mut country_sorted = country_city.clone();
+    country_sorted.sort_by_key(|k| k.0);
+
+
+    println!("Original:");
+    for x in &country_city {
+        println!("{} {}", x.0, x.1);
+    }
+
+    println!("\nWhen sorted by city:");
+    for x in &city_sorted {
+        println!("{} {}", x.0, x.1);
+    }
+
+    println!("\nWhen sorted by county:");
+    for x in &country_sorted {
+        println!("{} {}", x.0, x.1);
+    }
+}