Comment by kelas

> I'd call that code obfuscation.

we call them "trains". since this one has a descriptive name, `avg a`, is not cryptic at all. just a bit fewer of absolutely meaningless parens and duplication.

but it doesn't end there:

1. imagine you wanted a moving average instead. i need to change one character in this train to get `mavg`. what would you need to do?

2. imagine you want to compute moving averages for each of 1000 arrays using both instruction-level parallelism and all available cores? while you'd be writing your unobfuscated code for that, i'd be done way before you're back from your lunch break. in two keystrokes.

once you'd be done with your solution, there would be no need to discuss productivity, or so i hope, but to discuss performance would be interesting.