Please post your nominations for the Best of Code Review 2015 - Night and Day category.
The most dramatic improvement (nominate both the question with the most hopeless code and the answer that cleans it up the best).
In your nomination post, please make sure to include a link to the nominated answer. Include a short explanation of what makes the suggestions in the answer exceptional.
Small characters at the bottom: Only one nomination per post, nominated answers must have a creation date in 2015, downvotes don't count, and Santa reserves the right to award the top-voted nominee pair a special bounty as a token of appreciation on behalf of the Code Review community.