This is probably a pretty insane idea for a MyCode. Hell, I'm not sure if it was ever thought of before. If I'm not making much sense, I blame me being sleepy when I thought of it. I haven't fully thought everything out as I've just thought of it, but again, I hope it makes some sense.
The MyCode would let users define variables (like variables in various programming languages) and then another can refer to it. The syntax could look a little something like this:
Example:
I was thinking the variables could be restricted to the post it was defined in, that way other posts can't access them.