Purposeful and clean. Nice one!

This is eye opening for me. Really struggled to figure out the method for converting value to [value] and now it seems obvious. I tried a similar approach, but ended up doing too much by not understanding some fundamentals. I like your solution best!

If there's a way, kindly point me to it. Otherwise, I'd give my two front teeth for an option to turn off (Cmd + s) to Attempt. My save-twitch is causing me to miss out on first try submissions, and it's breaking my heart.

oh yeah no, just keep it a dictionary of [String : Int] and cast your characters into strings over and over... doh! LOL 3am coding strikes again

optimized AF

So bitwise AND determines a power of two... I wish I had seen that before I put my ignorance on display LOL

Really interesting kata. Definitely made me think. Thanks!

And yet, you could have gotten to a single line without having to resort to poor style.

So clean!

whoa, this is art

I recognize now that using an array was a poor memory decision. Two ideas collided and the array was a remnant of the reject. Do While would have solved my final if condition as well... Fail, learn, and move on!

I just submitted a PAGE and LOL when I saw the best solution. Why am I this way