From: http://xkcd.com/221/
import System.Random
main = randomRIO (1, 6 :: Int)
This is actually a hidden feature of the site: you can create "cacheable" snippets. We'll store the result produced the first time it's run and serve that to subsequent users to give a faster result. But beware: if the result depends on any kind of input, such as user input, random numbers, or the current time, the results will be unexpected.
As another example:
import Data.Time
main = getCurrentTime
The Markdown code for the above two snippets is:
```active haskell cache
import System.Random
main = randomRIO (1, 6 :: Int)
```
```active haskell cache
import Data.Time
main = getCurrentTime
```
This should be considered an "easter egg" feature, and may be removed at some point in the future.