当代码中有多层嵌套时,会降低代码的可读性,对于以后的修改也增加难度,所以我们需要分解复杂的判断并尽快返回. 重构前代码 public class Security { public ISecurityChecker SecurityChecker { get; set; } public Security(ISecurityChecker securityChecker) { SecurityChecker = securityChecker; } public bool HasAccess(U…
理解:移除重复的代码,顾名思义就是把多处重复的代码搬移到一个公共的地方,来减少代码量,提高代码可维护性. 详解:看下面的例子就很容易理解 重构前code using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Text; namespace ReflectorDemo { public class MedicalRecord { public…
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given "bcabc&q…
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given "bcabc&q…
