в 15:31, 26 мая 2010

2010-05-26T15:31:19Z

Admin: 1 версия

2010-05-26T11:45:28Z

1 версия

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==Class behaves properly using overridden Equals and GetHashCode methods==

<source lang="csharp">
using System;
using System.Collections;
public class GoodCompare {
public static void Main() {
Name president = new Name ("A", "B");
Name first = new Name ("C", "D");
Console.WriteLine("The hash codes for first and president are: ");

if (president.GetHashCode() == first.GetHashCode())
Console.WriteLine("equal");
else
Console.WriteLine("not equal");

}
}

public class Name {
protected String first;
protected char initial;
protected String last;

public Name(String f, String l) {
first = f;
last = l;
}
public Name(String f, char i, String l) : this(f,l) {
initial = i;
}
public override String ToString() {
if (initial == "\u0000")
return first + " " + last;
else
return first + " " + initial + " " + last;
}
public override bool Equals(Object o) {
if (!(o is Name))
return false;
Name name = (Name)o;
return first == name.first && initial == name.initial
&& last == name.last;
}
public override int GetHashCode() {
return first.GetHashCode() + (int)initial
+ last.GetHashCode();
}
}

</source>

==Get the Hash code for string value==

<source lang="csharp">
using System;
public class HashValues {
public static void Main( ) {
String[] identifiers ={"A","B","C","D","E","F","G","H","I","J","K","L"};

for(int i = 0; i < identifiers.Length; i++) {
String id = identifiers[i];
int hash = id.GetHashCode();
int code = hash % 23;
Console.WriteLine("{0,-12}{1,12}{2,12}", id, hash, code);
}
}
}

</source>

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Csharp/C Sharp/Development Class/Hash Code - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия