Vector Iterators Incompatible

The reason you are getting this, is that the iterators are from two (or more) different copies of myVec. You are returning a copy of the vector with each call to myFoo.getVec(). So the iterators are incompatible. Some solutions: Return a const reference to the std::vector<int> : const std::vector<int> & getVec(){return myVec;} //other stuff omitted … Read more

Inserting into a vector at the front

If one of the critical needs of your program is to insert elements at the begining of a container: then you should use a std::deque and not a std::vector. std::vector is only good at inserting elements at the end. Other containers have been introduced in C++11. I should start to find an updated graph with … Read more

How to change color of vector drawable path on button click

The color of the whole vector can be changed using setTint. You have to set up your ImageView in your layout file as this: <ImageView android:id=”@+id/myImageView” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:tint=”@color/my_nice_color” android:src=”https://stackoverflow.com/questions/35625099/@drawable/ic_my_drawable” android:scaleType=”fitCenter” /> Then to change the color of your image: DrawableCompat.setTint(myImageView.getDrawable(), ContextCompat.getColor(context, R.color.another_nice_color)); Note: myImageView.getDrawable() gives nullpointerexception if the vector drawable is set to the … Read more

C++ – value of uninitialized vector

The zero initialization is specified in the standard as default zero initialization/value initialization for builtin types, primarily to support just this type of case in template use. Note that this behavior is different from a local variable such as int x; which leaves the value uninitialized (as in the C language that behavior is inherited … Read more

How to access the contents of a vector from a pointer to the vector in C++?

There are many solutions, here’s a few I’ve come up with: int main(int nArgs, char ** vArgs) { vector<int> *v = new vector<int>(10); v->at(2); //Retrieve using pointer to member v->operator[](2); //Retrieve using pointer to operator member v->size(); //Retrieve size vector<int> &vr = *v; //Create a reference vr[2]; //Normal access through reference delete &vr; //Delete the … Read more