class Graph {
constructor() {
this.numberOfNodes = 0;
this.adjacentList = {
};
}
addVertex(node) {
this.adjacentList[node]=[];
this.numberOfNodes++;
}
addEdge(node1, node2) {
//undirected Graph
this.adjacentList[node1].push(node2);
this.adjacentList[node2].push(node1);
}
showConnections() {
const allNodes = Object.keys(this.adjacentList);
for (let node of allNodes) {
let nodeConnections = this.adjacentList[node];
let connections = "";
for (let vertex of nodeConnections) {
connections += vertex + " ";
}
console.log(node + "-->" + connections);
}
}
}
const myGraph = new Graph();
myGraph.addVertex('0');
myGraph.addVertex('1');
myGraph.addVertex('2');
myGraph.addVertex('3');
myGraph.addVertex('4');
myGraph.addVertex('5');
myGraph.addVertex('6');
myGraph.addEdge('3', '1');
myGraph.addEdge('3', '4');
myGraph.addEdge('4', '2');
myGraph.addEdge('4', '5');
myGraph.addEdge('1', '2');
myGraph.addEdge('1', '0');
myGraph.addEdge('0', '2');
myGraph.addEdge('6', '5');
myGraph.showConnections();
//Answer:
// 0-->1 2
// 1-->3 2 0
// 2-->4 1 0
// 3-->1 4
// 4-->3 2 5
// 5-->4 6
// 6-->5
