reset left num

@@ -44,11 +44,11 @@ exports.lte = (num1, num2, options) => {
  * @return {[boolen]}
  */
 exports.showStorage = (leftNumber) => {
-    leftNumber = typeof num1 === 'number' ? leftNumber : parseFloat(leftNumber, 10);
+    leftNumber = +leftNumber;
 
-    if (leftNumber <= 3 && leftNumber >= 0) {
+    if (leftNumber <= 3 && leftNumber > 0) {
         return `仅剩${leftNumber}件`;
-    } else if (leftNumber < 0) {
+    } else if (leftNumber <= 0) {
         return '库存不足';
     }
 };

@@ -4,11 +4,11 @@
  * @return {[boolen]}
  */
 module.exports = function(leftNumber) {
-    leftNumber = typeof num1 === 'number' ? leftNumber : parseFloat(leftNumber, 10);
+    leftNumber = +leftNumber;
 
-    if (leftNumber <= 3 && leftNumber >= 0) {
+    if (leftNumber <= 3 && leftNumber > 0) {
         return '仅剩' + leftNumber + '件';
-    } else if (leftNumber < 0) {
+    } else if (leftNumber <= 0) {
         return '库存不足';
     }
 };