Use enumerate() instead of manual counter

src/handlers/plasma.rs

@@ -31,8 +31,7 @@ pub fn change_wallpapers(wallpapers: &Wallpapers) {
 pub fn generate_js(wallpapers: &Wallpapers) -> String {
     let mut javascript = String::new();
     javascript.push_str("var allDesktops = desktops();\n");
-    let mut count = 0;
-    for monitor in wallpapers.config.monitors.monitors.iter() {
+    for (count, monitor) in wallpapers.config.monitors.monitors.iter().enumerate() {
         let mut boilerplate = String::new();
         let _ = write!(
             &mut boilerplate,
@@ -45,7 +44,6 @@ pub fn generate_js(wallpapers: &Wallpapers) -> String {
             wallpapers.random_selection(monitor)
         );
         javascript.push_str(&boilerplate);
-        count += 1;
     }
     javascript
 }