#不好的做法varappendArr:[String] = ["c","d","e"]varstrArr:[String] = ["a","b"]forvarx in appendArr{ strArr.append(x)}print("\(strArr)")#好的做法varappendArr:[String] = ["c","d","e"]varstrArr:[String] = ["a","b"]strArr.reserveCapacity(strArr.capacity+appendArr.capacity)strArr.appendContentsOf(appendArr)print("\(strArr)")
作者：氮化鎵加砷
鏈接：http://www.reibang.com/p/55e485542399
來(lái)源：簡(jiǎn)書
