> On the other hand, Wadler himself in "Why Functional Programming Matters" argues that laziness is essential to achieve modularity and composability. I just r

> On the other hand, Wadler himself in "Why Functional Programming Matters" argues that laziness is essential to achieve modularity and composability. I just read the part about it, I agree that lazy computation is a powerful tool for modularity and composability. But it's nothing specific to FP languages. Python and Nimrod do that through generators (yield keyword), D through "ranges" (no language support). Also not all algorithms you would want to write only once are easily expressible in a lazy way (eg. push parsers).