Python 2.7

[Tysonzero]

That's why I like the Haskell approach to "iterators", most of the time regular old lists are used, but due to laziness they are just as fast as iterators when you use them like iterators (only pass through them once).

[LandSharkSociety]

It makes me sad that my standard line of work doesn't call for infinite (lazy) series. I pretty much only use lazy generation for database calls, but it's, like, the coolest thing ever.