fix data check

snippets/equals.md

@@ -10,7 +10,7 @@ If none of the above conditions are met, use `Object.keys()` to check if both va
 const equals = (a, b) => {
   if (a === b) return true;
   if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();
-  if (!a || !b || (typeof a != 'object' && typeof b !== 'object')) return a === b;
+  if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b;
   if (a === null || a === undefined || b === null || b === undefined) return false;
   if (a.prototype !== b.prototype) return false;
   let keys = Object.keys(a);