[keithasaurus]

Hi, maintanier of blorp here. I think you mean that [1,2,3].map(func(x): x *2).filter(func(x): x > 5) would iterate twice, correct? Under the hood blorp optimizes that away for the functions we can. It constructs a loop and combines logic into a single iteration where possible.

Of course, blorp also allows local mutation in loops (even in pure functions, so long as the logic is contained to the function), so if there's a specific algorithm you'd rather express in a loop, you can.