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Is there a way to add values to the middle of a vector in C++? Say I have:
vector <string> a;
// a gets filled up with "abcd", "wertyu", "dvcea", "eafdefef", "aeefr", etc
and I want to break up one of the strings and put all of the pieces back into the vector. How would I do that? the strings I break can be anywhere, index = 0, somewhere in the middle, or index = a.size() - 1.
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Elements can be added in the middle of a Vector by using the java. util. Vector. insertElementAt() method.
To add elements to vector, you can use push_back() function. push_back() function adds the element at the end of this vector. Thus, it increases the size of vector by one.
A variety of mathematical operations can be performed with and upon vectors. One such operation is the addition of vectors. Two vectors can be added together to determine the result (or resultant).
The vector::insert() function in C++ Basically, the vector::insert() function from the STL in C++ is used to insert elements or values into a vector container. In general, the function returns an iterator pointing to the first of the inserted elements.
You can insert into a vector at position i by writing
v.insert(v.begin() + i, valueToInsert);
However, this isn't very efficient; it runs in time proportional to the number of elements after the element being inserted. If you're planning on splitting up the strings and adding them back in, you are much better off using a std::list, which supports O(1) insertion and deletion everywhere.
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