CODEWITHSUNDEEP
c++sortingvector
Beasly
Beasly

Reputation: 1537

Vector values not in inserting order

I'm inserting values into a vector:
vector<map<vector<string> , vector<string> > > listedParameterMap;

like this:
listedParameterMap.insert(listedParameterMap.end(), 1, parameterMap);

If I check later the vector, the order is inverted. Did I miss something?

EDIT:
I think it may be somewhere else... I just got an idea. But I'll try tomorrow. I almost had today aleady at least one brain-stackoverflow with my code ;)

Anyway thank you all for helping. I'll tell if somthing changes!

EDIT2:
Seems like the error is somewhere else. I just could see where it happens, but until now not why. On a point where the map should get filled just once, it gets filled twice. For some reason each time only on a specific value. That's why it was looking like the values are inverted.
If I need some help I'll open a new question. Thanks to everyone!

UPDATE:

The vector is ok now. Found the problem. Blindness of own code ;)

It doen't influence my programm my the map is inverted.
I just created a new map inserting and then printing the values, this works then as expected.

Upvotes: 0

Views: 1909

Answers (3)

winwaed
winwaed

Reputation: 7801

I really don't think you want to do a map that uses a vector as a key, do you? This smells like you have more significant design problems.

As for adding stuff to vectors in a known (and presered order), use push_back().

Upvotes: 0

Sarfaraz Nawaz
Sarfaraz Nawaz

Reputation: 361482

Why don't you simply write:

listedParameterMap.push_back(parameterMap);

It's simpler interface than what you're doing in your post.

Upvotes: 7

Jerry Coffin
Jerry Coffin

Reputation: 490158

I can't make much sense of your sample code, but if you want to insert items into a vector in order, you usually want to use push_back. For a trivial example:

std::vector<int> numbers;
for (int i=0; i<10; i++)
    numbers.push_back(i);

The numbers should now be in order, like: (1 2 3 4 5 6 7 8 9 10).

Upvotes: 2

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