small adjustments

graphTester.go

@@ -6,8 +6,7 @@ import (
 )
 
 func main() {
-	n := new(graph.Node)
-	n.Value = "1"
+	n := &graph.Node{Value: "1"}
 	n2 := new(graph.Node)
 	n2.Value = "2"
 	n3 := new(graph.Node)
@@ -16,7 +15,7 @@ func main() {
 	n.Connect(n2)
 	n.Connect(n3)
 	n2.Connect(n3)
-	n.DisconnectAll()
+	//n.DisconnectAll()
 	fmt.Println(n.IsConnectedTo(n3))
 	fmt.Println("n -> n2: ", n2.IsConnectedTo(n), " n <- n2: ", n.IsConnectedTo(n2))
 	fmt.Println("n -> n3: ", n.IsConnectedTo(n3), " n <- n3: ", n3.IsConnectedTo(n))

hello.go

@@ -1,17 +0,0 @@
-package main
-
-import(
-    "lib/collection"
-    "fmt"
-)
-
-func main() {
-    var s collection.Stack
-    s.Push("world")
-    s.Push("hello, ")
-    for s.Size() > 0 {
-        fmt.Print(s.Pop())
-    }
-    fmt.Println()
-    // Output: hello, world
-}

lib/graph/hello.go

@@ -4,41 +4,31 @@ import (
 	"fmt"
 )
 
-//Node a graph node which can contain connections to other nodes
+//Node a graph node which can contain Connections to other nodes
 type Node struct {
 	Value       string
-	connections []*Node
-	messages    []string
+	Connections []*Node
+	Messages    []string
 }
 
 //GetConnection returns the i'th connected node if it exists
 func (n *Node) GetConnection(i int) (*Node, error) {
-	if n.NrOfConnectedNodes() > i {
-		return n.connections[i], nil
+	if len(n.Connections) > i && i >= 0 {
+		return n.Connections[i], nil
 	}
 	return n, fmt.Errorf("slice out of bounds")
 }
 
-//GetConnections returns all connections
-func (n *Node) GetConnections() []*Node {
-	return n.connections
-}
-
-//GetMessages returns all messages in this Node
-func (n *Node) GetMessages() []string {
-	return n.messages
-}
-
 //Connect connects two nodes
 func (n *Node) Connect(otherNode *Node) {
-	n.connections = append(n.connections, otherNode)
-	otherNode.connections = append(otherNode.connections, n)
+	n.Connections = append(n.Connections, otherNode)
+	otherNode.Connections = append(otherNode.Connections, n)
 }
 
 //SetPointTo sets this Node to point towards the given Node
 func (n *Node) SetPointTo(otherNode *Node) {
 	if n.IsConnectedTo(otherNode) == false {
-		n.connections = append(n.connections, otherNode)
+		n.Connections = append(n.Connections, otherNode)
 	}
 }
 
@@ -47,7 +37,7 @@ func (n *Node) RemovePointerTo(otherNode *Node) int {
 	fmt.Println(otherNode)
 	i := n.GetIndexOf(otherNode)
 	if i != -1 {
-		n.connections = append(n.connections[:i], n.connections[i+1:]...)
+		n.Connections = append(n.Connections[:i], n.Connections[i+1:]...)
 		return i
 	}
 	return -1
@@ -58,9 +48,9 @@ func (n *Node) Disconnect(otherNode *Node) int {
 	i := n.GetIndexOf(otherNode)
 	j := otherNode.GetIndexOf(n)
 	if i != -1 && j != -1 {
-		//remove othernode from n.connections, and remove n from otherNode.connections
-		n.connections = append(n.connections[:i], n.connections[i+1:]...)
-		otherNode.connections = append(otherNode.connections[:j], otherNode.connections[j+1:]...)
+		//remove othernode from n.Connections, and remove n from otherNode.Connections
+		n.Connections = append(n.Connections[:i], n.Connections[i+1:]...)
+		otherNode.Connections = append(otherNode.Connections[:j], otherNode.Connections[j+1:]...)
 		return 1
 	}
 	return -1
@@ -68,7 +58,7 @@ func (n *Node) Disconnect(otherNode *Node) int {
 
 //DisconnectAll disconnects all Nodes
 func (n *Node) DisconnectAll() {
-	for _, v := range n.connections {
+	for _, v := range n.Connections {
 		n.Disconnect(v)
 	}
 }
@@ -86,7 +76,7 @@ func (n *Node) IsConnectedTo(otherNode *Node) bool {
 //GetIndexOf gets the index of the specified node.
 //May alternatively be used to check if n is pointing to otherNode
 func (n *Node) GetIndexOf(otherNode *Node) int {
-	for i, v := range n.connections {
+	for i, v := range n.Connections {
 		if v == otherNode { //addresses are compared
 			return i
 		}
@@ -94,12 +84,7 @@ func (n *Node) GetIndexOf(otherNode *Node) int {
 	return -1
 }
 
-//NrOfConnectedNodes number of nodes connected to this node
-func (n *Node) NrOfConnectedNodes() int {
-	return len(n.connections)
-}
-
-//InsertMessage inserts a string message in the messages field of this node
+//InsertMessage inserts a string message in the Messages field of this node
 func (n *Node) InsertMessage(message string) {
-	n.messages = append(n.messages, message) //append returns a new slice, so we have to replace it
+	n.Messages = append(n.Messages, message) //append returns a new slice, so we have to replace it
 }