W3Schools is a great resource for any coding questions. It is great for all as it can be a great refresher!
CodeAcademy is amazing at teach you almost any codeing language. It has a very user freindly layout and study plan. Which helps the user digest the information in a memorable way.
stackoverflow is a site that specializes in answering questions. On this site you can post, search, and reply to coding problems people have to help the community with whatever they might need!