Merge PR krausest#1933: Update leptos Rust lib

Author: krausest

frameworks/keyed/leptos/src/lib.rs

@@ -50,30 +50,18 @@ static ID_COUNTER: AtomicUsize = AtomicUsize::new(1);
 fn build_data(count: usize) -> Vec<RowData> {
     let mut thread_rng = thread_rng();
 
-    let mut data = Vec::new();
-    data.reserve_exact(count);
-
-    for _i in 0..count {
-        let adjective = ADJECTIVES.choose(&mut thread_rng).unwrap();
-        let colour = COLOURS.choose(&mut thread_rng).unwrap();
-        let noun = NOUNS.choose(&mut thread_rng).unwrap();
-        let capacity = adjective.len() + colour.len() + noun.len() + 2;
-        let mut label = String::with_capacity(capacity);
-        label.push_str(adjective);
-        label.push(' ');
-        label.push_str(colour);
-        label.push(' ');
-        label.push_str(noun);
-
-        data.push(RowData {
-            id: ID_COUNTER.load(Ordering::Relaxed),
-            label: ArcRwSignal::new(label),
-        });
-
-        ID_COUNTER.store(ID_COUNTER.load(Ordering::Relaxed) + 1, Ordering::Relaxed);
-    }
-
-    data
+    let mut label = || [ADJECTIVES, COLOURS, NOUNS]
+        .map(|slice| slice.choose(&mut thread_rng).unwrap())
+        .join(" ");
+
+    let id = ID_COUNTER.fetch_add(count, Ordering::Relaxed);
+
+    (id..id + count)
+        .map(|id| RowData {
+            id,
+            label: ArcRwSignal::new(label())
+        })
+        .collect()
 }
 
 /// Button component.