fix naming

snippets/capitalize.md

@@ -0,0 +1,11 @@
+### Capitalize first letter
+
+Use destructuring and `toUpperCase()` to capitalize first letter, `...rest` to get array of characters after first letter and then `Array.join('')` to make it a string again.
+Omit the `lowerRest` parameter to keep the rest of the string intact, or set it to `true` to convert to lower case.
+
+```js
+const capitalize = ([first,...rest], lowerRest = false) =>
+  first.toUpperCase() + (lowerRest ? rest.join('').toLowerCase() : rest.join(''));
+// capitalize('myName') -> 'MyName'
+// capitalize('myName', true) -> 'Myname'
+```