談減少垃圾的現狀、前景與機遇
C# 效能最佳化細節1、使用string.Empty給一個空字串變數賦初始值String.Empty是一個指代,而」」是具體的實作string filter=“”;//不建議 string filter=string.Empty; //建議2、使用str.Length == 0做空串比較最快的方法:if (str.Length == 0)其次:if (str == String.Empty)或if ( str == "")3、避免不必要的字串ToUpper、ToLower類別運算ToUpper、ToLower這類方法都會重新產生字串對String.Compare可實作忽略字串大小寫//不建議的寫法 if(s1.ToUpper()==s2.ToUpper()) …; //推薦的寫法 if(String.C
##簡介:如果要建構一個較長的字串,尤其是拼接超過10次時(經驗值),應使用StringBuilder做字串拼接運算。 【相關問答推薦】:
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