Flash Lite 1.1 子串问题

Question

你能告诉我为什么这两行都打印出a吗？
trace(substring("asd", 0, 1)); // == "a"
trace(substring("asd", 1, 1)); // == "a"
（this 打印出 s：
trace(substring("asd", 2, 1)); // == "s")

在 Flash Lite 1.x 中索引是否以 1 开头？

Answer 1

摘自
http://www.adobe.com/support/flash/action_scripts/ actionscript_dictionary/actionscript_dictionary701.html

Availability
Flash Player 4. This function has been deprecated in favor of String.substr .

Description
String function; extracts part of a string. This function is 1-based, 
whereas the String object methods are 0-based.