hash_map::size (STL/CLR)
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Counts the number of elements.
Syntax
size_type size();
Remarks
The member function returns the length of the controlled sequence. You use it to determine the number of elements currently in the controlled sequence. If all you care about is whether the sequence has nonzero size, see hash_map::empty (STL/CLR)().
Example
// cliext_hash_map_size.cpp
// compile with: /clr
#include <cliext/hash_map>
typedef cliext::hash_map<wchar_t, int> Myhash_map;
int main()
{
Myhash_map c1;
c1.insert(Myhash_map::make_value(L'a', 1));
c1.insert(Myhash_map::make_value(L'b', 2));
c1.insert(Myhash_map::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Myhash_map::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} after clearing", c1.size());
// add elements and clear again
c1.insert(Myhash_map::make_value(L'd', 4));
c1.insert(Myhash_map::make_value(L'e', 5));
System::Console::WriteLine("size() = {0} after adding 2", c1.size());
return (0);
}
[a 1] [b 2] [c 3]
size
() = 0 after clearing
size
() = 2 after adding 2
Requirements
Header: <cliext/hash_map>
Namespace: cliext