How can I check if I'm on the last element when iterating using foreach syntax [duplicate]

Question

For example:

for( auto &iter: item_vector ) {      if(not_on_the_last_element) printf(", "); } 

or

for( auto &iter: skill_level_map ) {      if(not_on_the_last_element) printf(", "); } 

Answer 1

You can't really. That's kind of the point of range-for, is that you don't need iterators. But you can just change your logic on how you print your comma to print it if it's not first:

bool first = true; for (auto& elem : item_vector) {     if (!first) printf(", ");     // print elem     first = false; } 

If that's the intent of the loop anyway. Or you could compare the addresses:

for (auto& elem : item_vector) {     if (&elem != &item_vector.back()) printf(", ");     // ... }