title: What is an adjacency list and how do you code one?
body: <p>Here is an <a href="https://stackoverflow.com/questions/2672866/create-graph-using-adjacency-list">SO post</a> of an adjacency list.  However I see no difference from a single-linked list?  Also here is a <a href="http://en.wikipedia.org/wiki/Adjacency_list" rel="nofollow noreferrer">wikipedia article</a> which says that it is all the edges (of a graph, discrete math type) in a list which is pretty broad, if I have a graph, which is not a path graph. How do I code an adjacency list?</p>