Fix for replacing the middle item in an Array

the provided code `styles[(styles.length - 1) / 2] = "Classics";` will replace the last item instead of the middle one. in order to fix that we need to change code like this : `styles[Math.floor((styles.length - 1) / 2)] = "Classics";`

1-js/05-data-types/04-array/2-create-array/solution.md

@@ -3,7 +3,7 @@
 ```js run
 let styles = ["Jazz", "Blues"];
 styles.push("Rock-n-Roll");
-styles[(styles.length + 1) / 2] = "Classics";
+styles[Math.floor((styles.length - 1) / 2)] = "Classics";
 alert( styles.shift() );
 styles.unshift("Rap", "Reggie");
 ```