Did you know dep. type languages can have

mutable arrays? I didn't until today:

http://cs.ru.nl/~wouters/Publications/MoreDepTypesForDistrArrays.pdf

No out of bounds exceptions, and you can prove shit like the idempotence of a swap operation repeated twice on the same pair of array elements. Good stuff.

>>4
Yes but they have mutable arrays and they work in the real world without bloating the executables http://stackoverflow.com/a/12945679.