Implemented in K! And not very much code either. Certainly shorter than some other language definitions I&#x27;ve read:<p><a href="http:&#x2F;&#x2F;www.nsl.com&#x2F;k&#x2F;f&#x2F;f.k" rel="nofollow">http:&#x2F;&#x2F;www.nsl.com&#x2F;k&#x2F;f&#x2F;f.k</a>