Javascript/Math: editing file name

Data-Structures/Graph/Graph.js

@@ -0,0 +1,44 @@
+class Graph {
+  constructor () {
+    this.adjacencyMap = {}
+  }
+
+  addVertex (v) {
+    this.adjacencyMap[v] = []
+  }
+
+  containsVertex (vertex) {
+    return typeof (this.adjacencyMap[vertex]) !== 'undefined'
+  }
+
+  addEdge (v, w) {
+    let result = false
+    if (this.containsVertex(v) && this.containsVertex(w)) {
+      this.adjacencyMap[v].push(w)
+      this.adjacencyMap[w].push(v)
+      result = true
+    }
+    return result
+  }
+
+  printGraph () {
+    const keys = Object.keys(this.adjacencyMap)
+    for (const i of keys) {
+      const values = this.adjacencyMap[i]
+      let vertex = ''
+      for (const j of values) { vertex += j + ' ' }
+      console.log(i + ' -> ' + vertex)
+    }
+  }
+}
+
+const example = () => {
+  const g = new Graph()
+  g.addVertex(1)
+  g.addVertex(2)
+  g.addVertex(3)
+  g.addEdge(1, 2)
+  g.addEdge(1, 3)
+  g.printGraph()
+}
+example()