в 15:31, 26 мая 2010

2010-05-26T15:31:02Z

Admin: 1 версия

2010-05-26T12:05:14Z

1 версия

Новая страница

==Adding value pair to a dictionary==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
}

</source>

==Adding value to a dictionary with indexer==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";
}

</source>

==Create SortedDictionary from a Dictionary==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;
ref class Reverse : public IComparer<int>{
public:
virtual int Compare(int x, int y) { return y - x; }
virtual bool Equals(int x, int y) { return x == y; }
virtual int GetHashCode(int obj) { return obj.GetHashCode(); }
};
void SortedDictionaryExample(Dictionary<int,String^>^ inDict)
{
SortedDictionary<int,String^>^ dict = gcnew SortedDictionary<int,String^>(inDict, gcnew Reverse());

dict->Add(6, "Six");
String^ t = dict[3];
Console::WriteLine("dict[3] = {0}\n", t);
}
void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

SortedDictionaryExample(dict);

}

</source>

==Does a Dictionary contain a certain key==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

Console::WriteLine("\nDictionary contains 6? [{0}]", dict->ContainsKey(6));

}

</source>

==Get Key Collection Enumerator and Value Collection Enumerator==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

Dictionary<int,String^>::KeyCollection::Enumerator ^key = dict->Keys->GetEnumerator();
Dictionary<int,String^>::ValueCollection::Enumerator ^value = dict->Values->GetEnumerator();
while ( key->MoveNext() && value->MoveNext()){
Console::WriteLine("Key = [{0}]\tValue = [{1}]", key->Current, value->Current);
}

}

</source>

==Get KeyValuePair from Dictionary==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

for each (KeyValuePair<int,String^>^ pair in dict)
{
Console::WriteLine("Key = [{0}]\tValue = [{1}]",
pair->Key, pair->Value);
}

}

</source>

==Get value by Dictionary indexer==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

String^ t = dict[3];
Console::WriteLine("dict[3] = {0}\n", t);

}

</source>

==Get values from a Dictionary==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;
ref class Reverse : public IComparer<int>{
public:
virtual int Compare(int x, int y) { return y - x; }
virtual bool Equals(int x, int y) { return x == y; }
virtual int GetHashCode(int obj) { return obj.GetHashCode(); }
};
void SortedDictionaryExample(Dictionary<int,String^>^ inDict)
{
SortedDictionary<int,String^>^ dict = gcnew SortedDictionary<int,String^>(inDict, gcnew Reverse());

dict->Add(6, "Six");
String^ t = dict[3];
Console::WriteLine("dict[3] = {0}\n", t);
Console::WriteLine("Sorted Values:");
for each (String ^s in dict->Values)
Console::WriteLine("\t{0}",s);
}
void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

SortedDictionaryExample(dict);

}

</source>

==Pass Dictionary to a function==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;
ref class Reverse : public IComparer<int>{
public:
virtual int Compare(int x, int y) { return y - x; }
virtual bool Equals(int x, int y) { return x == y; }
virtual int GetHashCode(int obj) { return obj.GetHashCode(); }
};
void SortedDictionaryExample(Dictionary<int,String^>^ inDict)
{
SortedDictionary<int,String^>^ dict = gcnew SortedDictionary<int,String^>(inDict, gcnew Reverse());

dict->Add(6, "Six");
String^ t = dict[3];
Console::WriteLine("dict[3] = {0}\n", t);
}
void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

SortedDictionaryExample(dict);

}

</source>

==The add method of dictionary takes the key and the value==

<source lang="csharp">
#include "stdafx.h"
using namespace System;
using namespace System::Collections::Generic;
int main()
{
IDictionary<String^, String^>^ dict;
dict = gcnew Dictionary<String^, String^>();

dict->Add("a", "A");
dict->Add("o", "B");
dict->Add("i", "C");

for each (KeyValuePair<String^, String^>^ pair in dict)
{
Console::WriteLine(" {0}: {1}", pair->Key, pair->Value);
}
dict->Remove("hat");

for each (KeyValuePair<String^, String^>^ pair in dict)
{
Console::WriteLine(" {0}: {1}", pair->Key, pair->Value);
}
}

</source>

==The remove method of dictionary takes the key as an argument==

<source lang="csharp">
#include "stdafx.h"
using namespace System;
using namespace System::Collections::Generic;
int main()
{
IDictionary<String^, String^>^ dict;
dict = gcnew Dictionary<String^, String^>();

dict->Add("a", "A");
dict->Add("o", "B");
dict->Add("i", "C");

for each (KeyValuePair<String^, String^>^ pair in dict)
{
Console::WriteLine(" {0}: {1}", pair->Key, pair->Value);
}
dict->Remove("hat");

for each (KeyValuePair<String^, String^>^ pair in dict)
{
Console::WriteLine(" {0}: {1}", pair->Key, pair->Value);
}
}

</source>

==Using for each to loop through a dictionary==

<source lang="csharp">
#include "stdafx.h"
#using <system.dll>
using namespace System;
using namespace System::Collections::Generic;

void main()
{
Dictionary<int,String^>^ dict = gcnew Dictionary<int,String^>();
dict->Add(1, "One");
dict->Add(6, "Six");
dict->Add(5, "Five");
dict->Add(3, "3");
dict[3] = "Three";
dict[7] = "Seven";

for each (KeyValuePair<int,String^>^ pair in dict)
{
Console::WriteLine("Key = [{0}]\tValue = [{1}]", pair->Key, pair->Value);
}

}

</source>

← Предыдущая	Версия 15:31, 26 мая 2010
(нет различий)

Visual C++ .NET/Collections/Dictionary - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия