map::clear (STL/CLR)
The latest version of this topic can be found at map::clear (STL/CLR).
Removes all elements.
Syntax
void clear();
Remarks
The member function effectively calls map::erase (STL/CLR)( map::begin (STL/CLR)(), map::end (STL/CLR)()). You use it to ensure that the controlled sequence is empty.
Example
// cliext_map_clear.cpp
// compile with: /clr
#include <cliext/map>
typedef cliext::map<wchar_t, int> Mymap;
int main()
{
Mymap c1;
c1.insert(Mymap::make_value(L'a', 1));
c1.insert(Mymap::make_value(L'b', 2));
c1.insert(Mymap::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Mymap::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
// clear the container and reinspect
c1.clear();
System::Console::WriteLine("size() = {0}", c1.size());
c1.insert(Mymap::make_value(L'a', 1));
c1.insert(Mymap::make_value(L'b', 2));
// display contents " [a 1] [b 2]"
for each (Mymap::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
c1.clear();
System::Console::WriteLine("size() = {0}", c1.size());
return (0);
}
[a 1] [b 2] [c 3]
size
() = 0
[a 1] [b 2]
size
() = 0
Requirements
Header: <cliext/map>
Namespace: cliext