jashkenas/coffee-script — pull request #2026 by charliesome (2012-01-11 06:17:37+00:00)
Title: Add a power operator

It's annoying to have to write `Math.pow` all the time when you're doing mathsy stuff in CoffeeScript, so I've implemented a power operator as `**`.

It's right associative and has higher precedence than the multiplicative operators (`*`, `/`, `%`)