Added Node Neighbors

Author: rodigu

Graphs/NodeNeighbors.js

@@ -0,0 +1,39 @@
+class Graph{
+ // Generic graph: the algorithm works regardless of direction or weight
+ constructor(){
+ this.edges = []
+ }
+
+ addEdge(node1, node2){
+ // Adding edges to the graph
+ this.edges.push({
+ node1,
+ node2
+ })
+ }
+
+ nodeNeighbors(node){
+ // Returns an array with all of the node neighbors
+ let neighbors = []
+ for (let i = 0; i < this.edges.length; i++) {
+ // Checks if they have an edge between them and if the neighbor is not
+ // already in the neighbors array
+ if (this.edges[i].node1 === node && !(neighbors.includes(this.edges[i].node2))) {
+ neighbors.push(this.edges[i].node2)
+ }
+ else if (this.edges[i].node2 === node && !(neighbors.includes(this.edges[i].node1))) {
+ neighbors.push(this.edges[i].node1)
+ }
+ }
+ return neighbors
+ }
+}
+
+(() => {
+ let graph = new Graph()
+ graph.addEdge(1, 2)
+ graph.addEdge(2, 3)
+ graph.addEdge(3, 5)
+ graph.addEdge(1, 5)
+ console.log(graph.nodeNeighbors(1))
+})()