Merge pull request #344 from atomiks/patch-4

[FIX] kebabCase styling + remove global variable + handle empty string

snippets/toKebabCase.md

@@ -12,12 +12,11 @@ A word is defined as following:-
 For more detailed explanation of this Regex [Visit this Site](https://regex101.com/r/bMCgAB/1)
 
 ```js
-const toKebabCase = str => {
-    let regex = rx = /[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g;
-    return str.match(regex).map(x =>{
-        return x.toLowerCase();
-    }).join('-');
-}
+const toKebabCase = str =>
+  str && str.match(/[A-Z]{2,}(?=[A-Z][a-z]+[0-9]*|\b)|[A-Z]?[a-z]+[0-9]*|[A-Z]|[0-9]+/g)
+    .map(x => x.toLowerCase())
+    .join('-');
+  
 // toKebabCase("camelCase") -> 'camel-case'
 // toKebabCase("some text") -> 'some-text'
 // toKebabCase("some-mixed_string With spaces_underscores-and-hyphens") -> 'some-mixed-string-with-spaces-underscores-and-hyphens'