Refactoring day1

node_modules/mongoose/lib/cast/boolean.js

@@ -14,17 +14,16 @@ const CastError = require('../error/cast');
  */
 
 module.exports = function castBoolean(value, path) {
+  if (value == null) {
+    return value;
+  }
+
   if (module.exports.convertToTrue.has(value)) {
     return true;
   }
   if (module.exports.convertToFalse.has(value)) {
     return false;
   }
-
-  if (value == null) {
-    return value;
-  }
-
   throw new CastError('boolean', value, path);
 };