I would like to assign value to vector of pair using iterator.
My Code :
class MyData
{
public:
void add(const pair<int, string *> &elem)
{
auto it = find_if(myVec.begin(), myVec.end(), [&](pair<int, string *> const & ref)
{
return ref.second == elem.second;
});
if (it != myVec.end()) //if found
{
*it->first = elem.first; //Error : indirection requires pointer operand
return;
}
myVec.push_back(elem);
}
vector<pair<int, string *>> myVec;
};
But I'm getting the following error:
*it->first = elem.first; -> indirection requires pointer operand
How can I properly assign value to an element in a vector of pair?
without the *
. Remember, the ->
also does dereferencing and once you dereference the iterator, you have an object of the type it iterates over, which in this case is a pair. Your current code tries to then dereference the pair, which doesn't make sense, hence the error. You could also do (*it).first
, but that's what the ->
is for, so why not use it?
#include <vector>
using namespace std;
class MyData
{
public:
void add(const pair<int, string *> &elem)
{
auto it = find_if(myVec.begin(), myVec.end(), [&](pair<int, string *> const & ref)
{
return ref.second == elem.second;
});
if (it != myVec.end()) //if found
{
it->first = elem.first; //Error : indirection requires pointer operand
return;
}
myVec.push_back(elem);
}
vector<pair<int, string *>> myVec;
};
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