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))
+})()