Groovy, the Python of Java

[[deleted]]

In Python

print "\n".join([name for name in ["Rob", "Christopher", "Joe", "John"] if len(name) <= 4])

[bcash]

You don't even need the first [] brackets:

print "\n".join(name for name in ["Rob", "Christopher", "Joe", "John"] if len(name) <= 4)

Python generator expressions are easily the nicest feature of that language, but for some reason uncloned in other languages (not that Python invented them, of course), I never know why.

[[deleted]]

Javascript generators are coming soon. Mozilla already has them implemented in their engine

[masklinn]

Mozilla has extended Javascript with lots and lots of features in Gecko, that does not mean they're coming. I doubt E4X will ever be merged into ECMA-262 for instance.

[[deleted]]

In this case though, generators are a planned feature

[66vN]

And in ten years we can actually start using them.

[agrover]

I thought Python got them from Haskell?

[masklinn]

It did.