Added let syntax and linked docs.rs

src/view/04_iteration.md

@@ -301,9 +301,9 @@ fn main() {
 ### Accessing an index while iterating with `<ForEnumerate/>`
 
 For the cases where you need to access the real-time index while iterating,
-Leptos provides a `<ForEnumerate/>` component.
+Leptos provides a [`<ForEnumerate/>`](https://docs.rs/leptos/latest/leptos/control_flow/fn.ForEnumerate.html) component.
 
-The props are identical to the `<For/>` component, but when rendering `children`
+The props are identical to the [`<For/>`](https://docs.rs/leptos/latest/leptos/control_flow/fn.For.html) component, but when rendering `children`
 it additionally provides a `ReadSignal<usize>` parameter as the index:
 
 ```rust
@@ -319,8 +319,19 @@ struct Counter {
     // Provides the index as a signal and the child T
     children={move |index: ReadSignal<usize>, counter: Counter| {
         view! {
-        <button>{move || index.get()} ". Value: " {move || counter.count.get()}</button>
+            <button>{move || index.get()} ". Value: " {move || counter.count.get()}</button>
         }
     }}
 />
 ```
+
+or it could also be used with the more convenient `let` syntax:
+```rust
+<ForEnumerate
+    each=move || counters.get() // Same as <For/>
+    key=|counter| counter.id    // Same as <For/>
+    let(idx, counter)           // let syntax
+>
+    <button>{move || idx.get()} ". Value: " {move || counter.count.get()}</button>
+</ ForEnumerate>
+```