0.2.比较接口Default 常见的3类比较接口 IStructuralEquatable IStructuralComparable
abstract class EqualityComparer:IEqualityComparer,IEqualityComparer
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static volatitle EqualityComparer//Default属性就返回了8种comparer
private static EqualityComparer<T> CreateComparer()
{
//根据不同情况返回8种默认实现的comparer
}
## 其他的额外方法
IndexOf()
LastIndexOf()
1.GenericEqualityComparer
2.NullableEqualityComparer
3.ObjectEqualityComparer
4.ByteEqualityComparer
5.EnumEqualityComparer
6.SByteEnumEqualityComparer
7.ShortEnumEqualityComparer
8.LongEnumEqualityComparer
abstract class Comparer:IComparer,IComparer
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public static ComparerCreateComparer产生4个不同的派生类,根据泛型
1. ComparisonComparer<T>
2. GenericComparer<T>
3. NullableComparer<T>
4. ObjectComparer<T>
0
我有比较的能力,我和其他instance比
int CompareTo(T other);
我是个比较器,所以我能比较任何两个instance
int Compare(T x,T y);
3.IEqualityComparer,IEqualityComparer 强调改变了equals也要改变gethashcode
bool Equals(T x,T y);
int GetHashCode(T obj);
IEquatable 强调是否相等
bool Equals(T other);
两个对象是否相等
IStructuralEquatable
Boolean Equals(Object other,IEqualityComparer comparer);
int GetHashCode(IQualityComparer comparer);
IStructuralComparable
Int32 CompareTo(Object other, IComparer comparer);