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Swift 2.0 的新玩意
Hugo
6/27/2015
do-while 變成 repeat-while
Console output in Xcode 6.3.2
Debug area in Xcode 7.0 beta
更靈活的extension
if-case, for-case
Guard for Early Exits
不需要unwrap
defer 離開前做點事
如果發⽣生錯誤,檔案不會關閉
類似try/finally,離開區塊前⼀一定會執⾏行
Algorithm Chaining
swift2.0 不⽀支援

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