Question

I’ve been working on learning python and somehow came up with following codes:

for item in list:
    while list.count(item)!=1:
        list.remove(item)

I was wondering if this kind of coding can be done in c++. (Using list length for the for loop while decreasing its size) If not, can anyone tell me why?

Thanks!

Answer 1

I am not a big Python programmer, but it seems like the above code removes duplicates from a list. Here is a C++ equivalent:

list.sort();
list.unique();

As for modifying the list while iterating over it, you can do that as well. Here is an example:

for (auto it = list.begin(), eit = list.end(); it != eit; ) {
    if (std::count(it, eit, *it) > 1)
        it = list.erase(it);
    else
        ++it;
}

Hope it helps.