I'm not sure what you find incomprehensible about the first example. The syntax is pretty standard. The only exotic thing is `$`, which is basically just like p

I'm not sure what you find incomprehensible about the first example. The syntax is pretty standard. The only exotic thing is `$`, which is basically just like putting brackets around the rest of the line. Here's the first example roughly translated to Python: def main(): x = 2 [x] = ["foo"] y = 3 [y] = ["bar"] print(x + y) Seems about the same level of comprehensibility to me. Is there anything in particular you find difficult to understand? The second example is expanded out and not how a person would normally write it, but if you're familiar with the basic concepts it's using, it shows why it works very clearly; think of it like assembler.