Out of idle curiosity, a quick look at 
the mean, standard deviation, and maximum
lengths of a line of source code I typically write.

BUILD:
$ cabal-dev install

USAGE:
$ ./cabal-dev/bin/len -h
Usage: len [file1 file2 ...]
  -h  --help  display this help

RUN:
$ ./cabal-dev/bin/len len.hs
max: 103.0,	 mean: 35.876712328767134,	 stddev: 22.322102403397455,	 path: len.hs