25-Graph/4-graph_add_edge.js at master · 4pmAlgorithm/25-Graph · GitHub

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// class Graph{
//     constructor(){
//         this.adjacencyList = {};
//     }
//     addVertex(vertex){
//         if(!this.adjacencyList[vertex]) {
//            this.adjacencyList[vertex] = [];
//          }
//        }
//     addEdge(v1,v2){
//         this.adjacencyList[v1].push(v2);
//         this.adjacencyList[v2].push(v1);
//     }
// }


class Graph {
    constructor(){
        this.adjacencyList = {}
    }
    addVertex(vertex){
        if(!this.adjacencyList[vertex]){
        this.adjacencyList[vertex] = []
        }
    }
    addEdge(v1, v2){
        this.adjacencyList[v1].push(v2)
        this.adjacencyList[v2].push(v1)
    }
}

// class Graph{
//     constructor(){
//         this.adjacencyList = {}
//     }
//     addVertex(vertex){
//         if(!this.adjacencyList[vertex]){
//             this.adjacencyList[vertex] = []
//         }
//     }
//     addEdge(v1,v2){
//         this.adjacencyList[v1].push(v2)
//         this.adjacencyList[v2].push(v1)
//     }
// }


let g = new Graph();
g.addVertex("Dallas");
g.addVertex("Tokyo");
g.addVertex("Aspen");
g.addEdge("Dallas", "Aspen")
console.log(g)