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class Student : IComparable<Student> | |
{ | |
public string Name { get; set; } | |
public int Number { get; set; } | |
public int SerialNo { get; set; } | |
public int Grade { get; set; } | |
public int CompareTo(Student other) | |
{ | |
if (other.SerialNo < SerialNo) |
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class SerialNoComparer : IComparer<Student> | |
{ | |
public int Compare(Student s1, Student s2) | |
{ | |
return s1.SerialNo.CompareTo(s2.SerialNo); | |
} | |
} |
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class Student | |
{ | |
public string Name { get; set; } | |
public int Number { get; set; } | |
public int SerialNo { get; set; } | |
public int Grade { get; set; } | |
public static IEqualityComparer<Student> SerialNoComparer { get => new SerialNoEqualityComparer(); } | |
public static IEqualityComparer<Student> NumberComparer { get => new NumberEqualityComparer(); } |
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List<Student> students = new List<Student>(); | |
// Add some students to this List | |
var specificStudent = new Student() { SerialNo = 12, Number = 34, Grade = 3, Name = "Joe" }; | |
bool exist1 = students.Contains(specificStudent, new NumberEqualityComparer()); | |
bool exist2 = students.Contains(specificStudent, new SerialNoEqualityComparer()); |
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class NumberEqualityComparer : IEqualityComparer<Student> | |
{ | |
public bool Equals(Student s1, Student s2) | |
{ | |
if (s1 == null && s2 == null) | |
return true; | |
else if (s1 == null || s2 == null) | |
return false; | |
else if (s1.Number == s2.Number) | |
return true; |
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class SerialNoEqualityComparer : IEqualityComparer<Student> | |
{ | |
public bool Equals(Student s1, Student s2) | |
{ | |
if (s1 == null && s2 == null) | |
return true; | |
else if (s1 == null || s2 == null) | |
return false; | |
else if (s1.SerialNo == s2.SerialNo) | |
return true; |
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class Student : IEquatable<Student> | |
{ | |
public string Name { get; set; } | |
public int Number { get; set; } | |
public int SerialNo { get; set; } | |
public int Grade { get; set; } | |
public bool Equals(Student other) | |
{ | |
if (other.SerialNo == SerialNo) |
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class Student : IEquatable<Student> | |
{ | |
public string Name { get; set; } | |
public int Number { get; set; } | |
public int SerialNo { get; set; } | |
public int Grade { get; set; } | |
public bool Equals(Student other) | |
{ | |
if (other.SerialNo == SerialNo) |
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bool result = false; | |
if (student1.GetHashCode() == student2.GetHashCode()) | |
result = student1.Equals(student2); |
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Student student1 = new Student() | |
{ | |
Name = "Joe", | |
Grade = 3, | |
Number = 10, | |
SerialNo = 3213214 | |
}; | |
Student student2 = new Student() | |
{ |
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