[jacquesm]

> You see the point I'm driving at, though?

Yes, absolutely. I thought you were right on the money with the words but I figured a bit of code would do wonders to hammer it down.

Erlang does an even better job I think:

  [X * X || X <- lists:seq(1,10), X * X > 10, X * X < 100].

Or:

  [Y || Y <- [X * X || X <- lists:seq(1,10)], Y > 10, Y < 100].

Slightly longer, but without that X * X repetition.

[angersock]

Yep. Erlang/Elixir is actually kind of a joy to work in for math stuff. Shoot me an email if you'd like to chat about that.

[jacquesm]

I'm slowly slogging my way through Project Euler in Erlang, it's my default way of learning anything new and so far I've been making progress but I'm pretty sure that what I'm writing is absolutely horrible non-idiomatic erlang. I will probably take you up on that but after I've learned a bit more so at least I stand half a chance of understanding you.