directly return expected value from DFS. Add spaces after control flow statements.

Author: aadil42

javascript/2331-evaluate-boolean-binary-tree.js

@@ -14,15 +14,17 @@
  * @return {boolean}
  */
 var evaluateTree = function(root) {
-    return (dfs(root) && true) || false; 
+    return dfs(root);
 };
 
 const dfs = (node) => {
-    if(!node.left && !node.right) return node.val;
+    if (!node.left && !node.right && node.val) return true;
+    if (!node.left && !node.right && !node.val) return false;
 
     const is2 = (node.val === 2);
-    if(is2) return dfs(node.left) || dfs(node.right);
+    if (is2) return dfs(node.left) || dfs(node.right);
 
     const is3 = (node.val === 3);
-    if(is3) return dfs(node.left) && dfs(node.right);
+    if (is3) return dfs(node.left) && dfs(node.right);
+
 }