Reverse-String.js

/*
Complete the function that accepts a string parameter, and reverses each word in the string. All spaces in the string should be retained.

Examples

"This is an example!" ==> "sihT si na !elpmaxe"
"double  spaces"      ==> "elbuod  secaps"

*/
function reverseWords(str) {
  return str.split("").reverse().join("").split(" ").reverse().join(" ");
}