dart-lang/dart-up-and-running-book — pull request #3 by Scorpiion (2012-11-29 06:12:06+00:00)
Title: Update of str.charCodes() -> str.charCode

Change:
str.charCodes() -> str.charCode

More info see breaking change note by Florian:
https://groups.google.com/a/dartlang.org/d/topic/misc/CH1S5UyjYJU/discussion