Java, python, C++, C# (Unity), javascript, php, Ocaml, SMLNJ.

The possibilities are endless. Better use streams.

My favorite dataset: http://jmcauley.ucsd.edu/data/amazon/

Favorite SO question: https://stackoverflow.com/questions/14415881/how-can-i-pair-socks-from-a-pile-efficiently

My favorite hypothetical band name based on a SO meta question: The Downvote System Malignancy

"electricity" was photons all along!! @wbeaty