How to draw grid using VertexArray?

[wixy0]

 I realized that I must use VertexArray to draw grid overlay in my level editor but I can't get it right. Can I do it by using one VertexArray (if yes how?) or do I need to use more VertexArrays (perhaps std::vector)?

[Stauricus]

a VertexArray is a Vector of sf::Vertext.
if you want just the grid, you could use lines instead (of course VertexArray will also work)
draw a line from (0, 0) to (0, 100)
another from (10, 0) to (10, 100)
another from (20, 0) to (20, 100)
[repeat]

then you do horizontal lines (its the same logic):
draw a line from (0, 0) to (100, 0)
another from (0, 10) to (100, 10)
another from (0, 20) to (100, 20)

(use 'for' loops to avoid repetition of code)

[wixy0]

Yes, I know. I actually did it like this:

sf::Vertex line[2];
                for (int i = m_ViewDefaultCenter.y - m_MapHeight * m_TileSize; i <= m_ViewDefaultCenter.y + m_MapHeight * m_TileSize; i += m_TileSize)
                {
                        line[0] = sf::Vector2f(m_ViewDefaultCenter.x - m_MapWidth * m_TileSize, i);
                        line[1] = sf::Vector2f(m_ViewDefaultCenter.x + m_MapWidth * m_TileSize, i);
                        m_Window.draw(line, 2, sf::Lines);
                }

                for (int i = m_ViewDefaultCenter.x - m_MapWidth * m_TileSize; i <= m_ViewDefaultCenter.x + m_MapWidth * m_TileSize; i += m_TileSize)
                {
                        line[0] = sf::Vector2f(i, m_ViewDefaultCenter.y - m_MapHeight * m_TileSize);
                        line[1] = sf::Vector2f(i, m_ViewDefaultCenter.y + m_MapHeight * m_TileSize);
                        m_Window.draw(line, 2, sf::Lines);
                }

I thought there is a better, more optimized way because of this post: https://en.sfml-dev.org/forums/index.php?topic=22021.0