js实现图的构造

function Edge(data) {
        this.src = data[0];
        this.des = data[1];
        this.weight = data[2];
        this.next = null;
    }

    function Node(val) {
        this.val = val;
        this.next = null;
    }
    var graph = {};

    function makeGraph() {
        var data = [[0,1,2],[1,2,3],[3,4,11],[2,4,21],[4,3,12],[4,5,111]];
        for (var i = 0; i < data.length; i++) {
            var current = data[i];
            var edge = new Edge(current);
            if (graph[current[0]]) {
                edge.next = graph[current[0]].next;
                graph[current[0]].next = edge;
            } else {
                graph[current[0]] = new Node(current[0]);
                graph[current[0]].next = edge;
                edge.next = null;
            }
        }
    }