update toSnakeCase.md

snippets/toSnakeCase.md

@@ -6,7 +6,12 @@ Use `replace()` to add underscores before capital letters, convert `toLowerCase(
 
 ```js
 const toSnakeCase = str =>
-  str.replace(/(\w)([A-Z])/g, '$1_$2').replace(/[\s-_]+/g, '_').toLowerCase();
+  let regex = rx = /[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g;
+    let arr = str.match(regex);
+    arr = arr.forEach(x =>{
+        return s.toLowerCase();
+    });
+    return arr.join('_')
 // toSnakeCase("camelCase") -> 'camel_case'
 // toSnakeCase("some text") -> 'some_text'
 // toSnakeCase("some-javascript-property") -> 'some_javascript_property'