What are vectors and how are they used in programming?
I'm familiar with the mathematical/physics concept of a vector as a magnitude and a direction, but I also keep coming across references to vectors in the context of programming (for example …
std::vector versus std::array in C++ - Stack Overflow
Dec 12, 2010 · std::vector is a template class that encapsulate a dynamic array 1, stored in the heap, that grows and shrinks automatically if elements are added or removed. It provides all …
Is std::vector so much slower than plain arrays? - Stack Overflow
Sep 8, 2010 · So array is twice as quick as vector. But after looking at the code in more detail this is expected; as you run across the vector twice and the array only once. Note: when you …
Magnitude of a Vector | Calculation & Components - Study.com
Learn the meaning of the magnitude of a vector, how to find the magnitude of a vector, and finding the components of a vector from magnitude and angle.
Arrays vs Vectors: Introductory Similarities and Differences
Feb 26, 2013 · What are the differences between an array and a vector in C++? An example of the differences might be included libraries, symbolism, abilities, etc. Array Arrays contain a …
When should I use vector::at instead of vector::operator []?
Since it is unlikely that an out of bounds access to a vector is part of the normal program flow (in the case it is, you're right: check beforehand with size instead of letting the exception bubble …
Vector in Math | Definition, Types & Examples - Study.com
This lesson defines what a vector is in math and geometry. This lesson will also cover vector operations with examples.
Removing item from vector while iterating? - Stack Overflow
Jan 17, 2011 · 0 Removing items from the middle of a vector will invalidate all iterators to that vector, so you cannot do this (update: without resorting to Wilx's suggestion). Also, if you're …
c++ - Vector of Vectors to create matrix - Stack Overflow
What you have initialized is a vector of vectors, so you definitely have to include a vector to be inserted ("Pushed" in the terminology of vectors) in the original vector you have named matrix …
Initializing the size of a C++ vector - Stack Overflow
Undefined Behaviour !! } The default constructed vector, as in the example above creates an empty vector. Accessing elements outside of the range of the vector is Undefined Behavior. …