Compare multimap with String

Question

I want to compare an element from a multimap with a string, like:

struct value { 
string res;
time_t t;
};

string result; 

multimap<int, value> values
value new_value;  

if((values.find(new_value.res)) != result)    // code snipped
{
//... do something
}

Thanks!

Answer 1

You can use std::find and a lambda expression

auto it=std::find_if(values.begin(), values.end(), [&](const std::pair<int,value> &pair)
{
  return pair.second.res == new_value.res
});

if (it != values.end())
{
  // Found it
}

If you don't have access to C++11 then you can loop over it:

for(std::map<int,value>::iterator it=values.begin(); it!=values.end(); ++it)
{
  if( (*it).second.res == new_value.res)
  {
    // Found it,
    break;
  }
}