Visual C++ .NET/Collections/list

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Adding one list to another list

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");
   alist->Insert(1, gcnew MyClass("Two"));
   List<MyClass^>^ morenums = gcnew List<MyClass^>();
   morenums->Add(gcnew MyClass("Four"));
   morenums->Add(gcnew MyClass("Five"));

   alist->AddRange(morenums);

}

 </source>


Add to list with push_front

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("a")); 
   pets.push_front(gcnew MyClass("b"));
   pets.push_front(gcnew MyClass("c"));
   pets.push_front(gcnew MyClass("d"));
   return (0);

}

 </source>


Add your class to a generic List

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");

}

 </source>


For each loop and list

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("A")); 
   pets.push_front(gcnew MyClass("B"));
   pets.push_front(gcnew MyClass("C"));
   pets.push_front(gcnew MyClass("D"));
   ICollection<MyClass^>^ genericIList = %pets;
   genericIList->Add(gcnew MyClass("E"));
 pets.sort();
   for each (MyClass^ pet in genericIList) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>


For loop and element count

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");
   for (int i = 0; i < alist->Count; i++)
       Console::WriteLine("{0} ", alist[i]);

}

 </source>


Get the first element in a list

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("a")); 
   pets.push_front(gcnew MyClass("b"));
   pets.push_front(gcnew MyClass("c"));
   pets.push_front(gcnew MyClass("d"));
   list<MyClass^>::iterator pet_i = pets.begin();   
   pets.insert(++pet_i, gcnew MyClass("Jack"));
   for(pet_i = pets.begin(); pet_i != pets.end(); pet_i++)
       System::Console::Write("{0} ", pet_i->Name); 
   return (0);

}

 </source>


Insert element to a list

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");
   alist->Insert(1, gcnew MyClass("Two"));

}

 </source>


Insert from .NET generic List<T>

<source lang="csharp">

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

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) {

   set<MyClass^> pets; 
   MyClass^ King = gcnew MyClass("K");
   pets.insert(pets.end(), gcnew MyClass("A"));
   pets.insert(King); 
   pets.insert(gcnew MyClass("B"));
   
   List<MyClass^>^ morepets = gcnew List<MyClass^>();
   morepets->Add(gcnew MyClass("D"));
   morepets->Add(gcnew MyClass("AA"));
   pets.insert(morepets);
   for each (MyClass^ pet in pets) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>


Insert to a list

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("a")); 
   pets.push_front(gcnew MyClass("b"));
   pets.push_front(gcnew MyClass("c"));
   pets.push_front(gcnew MyClass("d"));
   list<MyClass^>::iterator pet_i = pets.begin();   
   pets.insert(++pet_i, gcnew MyClass("Jack"));
   for(pet_i = pets.begin(); pet_i != pets.end(); pet_i++)
       System::Console::Write("{0} ", pet_i->Name); 
   return (0);

}

 </source>


List.FindAll with predicate

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");
   for (int i = 0; i < alist->Count; i++)
       Console::WriteLine("{0} ", alist[i]);
   List<MyClass^>^ x = alist->FindAll(gcnew Predicate<MyClass^>(MyClass::hasX));

}

 </source>


List.ForEach and Action

<source lang="csharp">

  1. include "stdafx.h"

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

   String^ Value;
   MyClass(String^ in);
   virtual String^ ToString() override;
   static bool hasX(MyClass^ val);
   static void formatString(MyClass^ val);

}; MyClass::MyClass(String^ in) : Value(in) {} String^ MyClass::ToString() { return Value; } bool MyClass::hasX(MyClass^ val) {

   return val->Value->ToUpper()->IndexOf("X") > 0;

} void MyClass::formatString(MyClass^ val) {

   val->Value = String::Format("** {0} **", val->Value);

} void main(){

   List<MyClass^>^ alist = gcnew List<MyClass^>();
   alist->Add(gcnew MyClass("One"));
   alist->Add(gcnew MyClass("-"));
   alist[1] = gcnew MyClass("Three");
   for (int i = 0; i < alist->Count; i++)
       Console::WriteLine("{0} ", alist[i]);
       
   alist->ForEach(gcnew Action<MyClass^>(MyClass::formatString));
   for each(MyClass^ str in alist)
       Console::WriteLine("{0} ", str);

}

 </source>


Loop through a list with for loop

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("a")); 
   pets.push_front(gcnew MyClass("b"));
   pets.push_front(gcnew MyClass("c"));
   pets.push_front(gcnew MyClass("d"));
   list<MyClass^>::iterator pet_i = pets.begin();   
   pets.insert(++pet_i, gcnew MyClass("Jack"));
   for(pet_i = pets.begin(); pet_i != pets.end(); pet_i++)
       System::Console::Write("{0} ", pet_i->Name); 
   return (0);

}

 </source>


Merge lists by greater-functor

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

}; ref class MyGreaterThanFunctor{ public:

   bool operator()(MyClass^ a, MyClass^ b)
   {
       return a > b;
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("A")); 
   pets.push_front(gcnew MyClass("B"));
   pets.push_front(gcnew MyClass("C"));
   pets.push_front(gcnew MyClass("D"));
   list<MyClass^> puppies; 
   puppies.push_front(gcnew MyClass("E")); 
   puppies.push_front(gcnew MyClass("F"));
 pets.sort(gcnew MyGreaterThanFunctor());
 puppies.sort(greater<MyClass^>());
   pets.merge(puppies, greater<MyClass^>());
   for each (MyClass^ pet in pets) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>


Pointer for list element

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("A")); 
   pets.push_front(gcnew MyClass("B"));
   pets.push_front(gcnew MyClass("C"));
   pets.push_front(gcnew MyClass("D"));
   list<MyClass^> myList; 
   list<MyClass^>::iterator pet_ir = pets.begin();
   int randMyClassNo = (gcnew Random())->Next(pets.size());
   for (int i = 0; i < randMyClassNo; i++)
       pet_ir++;
   myList.splice(myList.begin(), pets, pet_ir);
   for each (MyClass^ pet in pets) 
       System::Console::Write("{0} ", pet->Name); 
   for each (MyClass^ pet in myList) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>


Splice a list

<source lang="csharp">

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

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->CompareTo(rhs->Name) > 0);
   }
   bool operator==(const MyClass^ rhs){
       return (Name->Equals(rhs->Name));
   }

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

   list<MyClass^> pets; 
   pets.push_front(gcnew MyClass("A")); 
   pets.push_front(gcnew MyClass("B"));
   pets.push_front(gcnew MyClass("C"));
   pets.push_front(gcnew MyClass("D"));
   list<MyClass^> myList; 
   list<MyClass^>::iterator pet_ir = pets.begin();
   int randMyClassNo = (gcnew Random())->Next(pets.size());
   for (int i = 0; i < randMyClassNo; i++)
       pet_ir++;
   myList.splice(myList.begin(), pets, pet_ir);
   for each (MyClass^ pet in pets) 
       System::Console::Write("{0} ", pet->Name); 
   for each (MyClass^ pet in myList) 
       System::Console::Write("{0} ", pet->Name); 
   return (0);

}

 </source>