Visual C++ .NET/Collections/map

Материал из .Net Framework эксперт
Версия от 15:05, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Create map between Class and double value

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   return (0);

} 

 </source>


Erase element from a map

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   map<MyClass^, double> copy;
   map<MyClass^, double>::iterator myMap_e = myMap.end();
   copy.insert(myMap.begin(), --myMap_e);
   map<MyClass^, double>::iterator myMap_cb = copy.begin();
   copy.erase(++myMap_cb);
   copy.erase(gcnew MyClass("Lady"));
   for each (KeyValuePair<MyClass^, double> ^kvp in (IDictionary<MyClass^, double>^)%copy)
       System::Console::Write("{0} [{1}]  ", kvp->Key->Name, kvp->Value);
       
   return (0);

} 

 </source>


Find a key-value pair in a map

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   map<MyClass^, double> copy;
   map<MyClass^, double>::iterator myMap_e = myMap.end();
   copy.insert(myMap.begin(), --myMap_e);
   map<MyClass^, double>::iterator myMap_cb = copy.begin();
   copy.erase(++myMap_cb);
   copy.erase(gcnew MyClass("Lady"));
   for each (KeyValuePair<MyClass^, double> ^kvp in (IDictionary<MyClass^, double>^)%copy)
       System::Console::Write("{0} [{1}]  ", kvp->Key->Name, kvp->Value);

   Console::WriteLine("\n\nFound = {0}", copy.find(King)->first->Name);
   map<MyClass^, double>::iterator Lady = copy.find(gcnew MyClass("Lady"));
   Console::WriteLine("Did {0}Find = Lady", (Lady == copy.end()) ? "not " : "");
           
   return (0);

} 

 </source>


Insert element to a map

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   map<MyClass^, double> copy;
   map<MyClass^, double>::iterator myMap_e = myMap.end();
   copy.insert(myMap.begin(), --myMap_e);
   map<MyClass^, double>::iterator myMap_cb = copy.begin();
   copy.erase(++myMap_cb);
   copy.erase(gcnew MyClass("Lady"));
   for each (KeyValuePair<MyClass^, double> ^kvp in (IDictionary<MyClass^, double>^)%copy)
       System::Console::Write("{0} [{1}]  ", kvp->Key->Name, kvp->Value);
       
   return (0);

} 

 </source>


Insert myMap from .NET Dictionary<T>

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   Dictionary<MyClass^, double>^ moremyMap = gcnew Dictionary<MyClass^, double>();
   moremyMap->Add(gcnew MyClass("Daisy"), 5);
   moremyMap->Add(gcnew MyClass("Lady"), 7);
   for each (KeyValuePair<MyClass^, double> ^kvp in moremyMap)
       myMap.insert(map<MyClass^, double>::make_value(kvp->Key, kvp->Value));
       
   return (0);

} 

 </source>


Insert to a map

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   return (0);

} 

 </source>


Is insert operation successful

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   map<MyClass^, double>::pair_iter_bool success;
   success = myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("N"),0.1));
   Console::WriteLine("First Time {0} age {1} is added {2}", 
       success.first->first->Name, 
       success.first->second, 
       success.second ? "successfully" : "unsuccessfully");
   return (0);

} 

 </source>


List of a Map

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   List<map<MyClass^, double>::value_type>^ evenmoremyMap = gcnew List<map<MyClass^, double>::value_type>();
   evenmoremyMap->Add(map<MyClass^, double>::make_value(gcnew MyClass("AA"), 1));
   evenmoremyMap->Add(map<MyClass^, double>::make_value(gcnew MyClass("AAA"), 2));
   myMap.insert(evenmoremyMap);
   IDictionary<MyClass^, double>^ myMap_IDict = %myMap;
   for each (KeyValuePair<MyClass^, double> ^kvp in myMap_IDict)
       System::Console::Write("{0} [{1}]  ", kvp->Key->Name, kvp->Value);
       
   return (0);

} 

 </source>


Loop through map with IDictionary<> interface

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   Dictionary<MyClass^, double>^ moremyMap = gcnew Dictionary<MyClass^, double>();
   moremyMap->Add(gcnew MyClass("Daisy"), 5);
   moremyMap->Add(gcnew MyClass("Lady"), 7);
   for each (KeyValuePair<MyClass^, double> ^kvp in moremyMap)
       myMap.insert(map<MyClass^, double>::make_value(kvp->Key, kvp->Value));
       
   return (0);

} 

 </source>


Map reverse interator

<source lang="csharp">

  1. include "stdafx.h"
  2. include <cliext/map>

using namespace System; using namespace cliext; using namespace System::Collections::Generic; ref class MyClass{ public: 

   String^ Name;
   MyClass() : Name(String::Empty) { }
   MyClass(String^ name) : Name(name) { }
   MyClass(const MyClass% orig){
       Name = orig.Name; 
   }
   MyClass% operator=(const MyClass% orig){
       if (this != %orig)
           Name = orig.Name;
       return *this;
   }
   ~MyClass() { }
   bool operator<(const MyClass^ rhs){
       return (Name->CompareTo(rhs->Name) < 0);
   }
   bool operator==(const MyClass^ rhs)
   {
       return (Name->Equals(rhs->Name));
   }

}; int main(array<System::String ^> ^args) { 

   map<MyClass^, double> myMap; 
   MyClass^ King = gcnew MyClass("A"); 
   myMap.insert(myMap.end(), map<MyClass^, double>::make_value(gcnew MyClass("Z"), 3.0));
   myMap.insert(map<MyClass^, double>::make_value(King, 10.0)); 
   myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("B"),9.0));
   map<MyClass^, double>::pair_iter_bool success;
   success = myMap.insert(map<MyClass^, double>::make_value(gcnew MyClass("N"),0.1));
   Console::WriteLine("First Time {0} age {1} is added {2}", 
       success.first->first->Name, 
       success.first->second, 
       success.second ? "successfully" : "unsuccessfully");
   map<MyClass^, double>::reverse_iterator pet_ri;
   for(pet_ri = myMap.rbegin(); pet_ri != myMap.rend(); pet_ri++)
       System::Console::Write("{0} [{1}]  ", pet_ri->first->Name, pet_ri->second); 
       
   return (0);

} 

 </source>
Источник — «http://nfex.ru/index.php?title=Visual_C%2B%2B_.NET/Collections/map&oldid=3501»