Make the function bounds for map less restrictive

packages/signals/examples/iterator.rs

@@ -0,0 +1,28 @@
+use dioxus::prelude::*;
+use dioxus_signals::*;
+
+fn main() {
+    dioxus_desktop::launch(App);
+}
+
+#[component]
+fn App(cx: Scope) -> Element {
+    let signal = use_signal(cx, || vec![String::from("Hello"), String::from("World")]);
+
+    render! {
+        button {
+            onclick: move |_| {
+                signal.write().push(String::from("Hello"));
+            },
+            "Add one"
+        }
+        for i in 0..signal().len() {
+            Child { signal: signal.map(move |v| v.get(i).unwrap()) }
+        }
+    }
+}
+
+#[component]
+fn Child(cx: Scope, signal: SignalMap<String>) -> Element {
+    render! {"{signal:?}"}
+}