Siwtf3的字典複製

   字典同數組一樣，在賦值或參數傳遞過程中會發生複製行爲。下面我們通過一個例子來說明字典的複製：   1 |  var addressDict = ["上海" : "黃浦區","廣東" : "深圳","江蘇" : "南京"]   2 |  var copyDict = addressDict   3 |  addressDict["上海"] = "浦東新區"   4 |  print(addre

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