Update README.md

Endlessline · web-flow · commit 17512c316379 · 2017-01-16T10:43:13.000-07:00
diff --git a/README.md b/README.md
@@ -106,7 +106,7 @@ saveCityZipCode(address.match(cityZipCodeRegex)[1], address.match(cityZipCodeReg
 ```javascript
 const address = 'One Infinite Loop, Cupertino 95014';
 const cityZipCodeRegex = /^[^,\\]+[,\\\s]+(.+?)\s*(\d{5})?$/;
-const [, city, zipCode] = address.match(cityZipCodeRegex);
+const [, city, zipCode] = address.match(cityZipCodeRegex) || [];
 saveCityZipCode(city, zipCode);
 ```
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