#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:氮化镓加砷
链接:https://www.jianshu.com/p/55e485542399
來源:简书