See also a different comparison (on ~the same problem) at StackExchange: https://codegolf.stackexchange.com/questions/188133/bentleys-coding-challenge-k-most-fr

See also a different comparison (on ~the same problem) at StackExchange: https://codegolf.stackexchange.com/questions/188133/bentleys-coding-challenge-k-most-frequent-words https://codegolf.stackexchange.com/questions/188133/bentleys... (Copying from my comment the last time this was posted: https://news.ycombinator.com/item?id=26467684 https://news.ycombinator.com/item?id=26467684) There's also a nice book "Exercises in Programming Style" about just this problem.