It looks scary

The kata can't be submitted with Elixir 1.6, so you should use an older version

I wish I thought about using recursion in this kata

Now you can find them

Cheating http://www.codewars.com/kata/reviews/57642a95dee2da8dd3000163/groups/57a3be217cb1f3cffc002191 ?

Definitely it's not 8 kyu kata

It's unfair to use eval in any form. I'm dissappointed.

There should be a version of the kata where you should add a custom operator and/or operators like sin/cos/max.

You broke syntax highlighting

It looks cool

"Sorry this page does not exist =("

It's "There is no portal here ... sending you back to Aha!". I guess you should write feature requests on Github now

In many solutions you can easily get a secret key using:

lock.keys[0]

So it's not a real lock. The test can prevent this (but still you can store the keys with different name):

expect(lock).not.to.have.property('keys');

It's CamingoCode