[sizzzzlerz]

Love the animations but they go by too fast. It would be nice if you could add a single step capability so the user could follow along at human pace.

Also, I wanted to see how you updated the bit strings in place and was surprised not to find anything special. It looks like you use nothing but puts statements, which, as I understand it, simply add a carriage return at the end of a string but how then does the cursor move back up to the first line? Can some explain the technique being used here?

[inersha]

If you add the third optional argument of "enter" when running the sha256.rb script you can use your keyboard to step through. I haven't set this up for the individual animations though.

ruby sha256.rb sizzzzlerz enter

I didn't do anything special for the terminal animation. I just work out the current state of the hash function at each step, clear the terminal, and print the entire state back to the screen. I know it looks like I'm directly manipulating each individual bit in your terminal, but really I'm just redrawing your screen.

I'd like to do something more practical in future, but for this I just did what I needed to do to get an animation working. Still, every bit you are seeing is correct.

[sizzzzlerz]

Thanks! I detected a few flashes in some lines that weren't active but I didn't believe you could clear and reprint the entire screen that fast. Very cool!