<i>the team wanted to let people track how much a document had changed over time. They pored over Ph.D. theses and complex algorithms. Instead, ace programmer David Hansson worked out a "cheat": software to track the number of characters in each document. ... With that clever solution, 37signals reduced what could have been a months-long programming project to a day's work</i><p>full implementation:<p>counter++<p>
Keyword: "Ace"