Update longestString()

snippets/longestString.md

@@ -1,9 +1,10 @@
 ### longestString
 
-Takes an array of strings and returns the longestString one.
+Takes an array of strings and returns the longest one.
 
 Uses the [rest operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/rest_parameters)
 to handle arrays as well as an indefinite amount of single arguments.
+Strings are compared using `Array.reduce()`.
 
 ```js
 const longestString = (...strings) => [...strings].reduce((a, b) => a.length > b.length ? a : b);