sibnerian

function buildGraph(edges) {
  let graph = Object.create(null);
  function addEdge(from, to) {
    if (graph[from] == null) {
      graph[from] = [to];
    } else {
      graph[from].push(to);
    }
    console.log(from, to);
    console.log(graph[from]); //vs console.log(graph);  why does printing the entire graph here print the completed graph on the second call, even though it shouldn't be fully constructed until the last call?