### Anagrams of string (with duplicates)

Use recursion.
For each letter in the given string, create all the partial anagrams for the rest of its letters.
Use `map()` to combine the letter with each partial anagram, then `reduce()` to combine all anagrams in one array.
Base cases are for string `length` equal to `2` or `1`.

```js
var anagrams = s => {
  if(s.length <= 2)  return s.length === 2 ? [s, s[1] + s[0]] : [s];
  return s.split('').reduce( (a,l,i) => {
    anagrams(s.slice(0,i) + s.slice(i+1)).map( v => a.push(l+v) );
    return a;
  }, []);
}
```