How to use “distanceTo”, “advancedBy” to handle String in Xcode7 beta6

Question

I have an extension on String, it works fine on Xcode7 beta5. However, I upgraded to beta 6 yesterday. It seems Swift syntax has some changes. There are some errors while co

Answer 1

What's happened is that the global functions distance and advance have been replaced by instance methods distanceTo and advancedBy.

Answer 2

OK, I figure out how to use these.