Merge pull request #21 from giraffesyo/master

Add weights to serialization

Author: curran

README.md

@@ -166,6 +166,7 @@ Serializes the graph. Returns an object with the following properties.
  * `links` An array of objects representing edges, each with the following properties.
    * `source` The node identifier string of the source node (**u**).
    * `target` The node identifier string of the target node (**v**).
+   * `weight` The weight of the edge between the source and target nodes.
 
 Here's example code for serializing a graph.
 
@@ -186,8 +187,8 @@ The following will be the value of `serialized`.
     { "id": "c" }
   ],
   "links": [
-    { "source": "a", "target": "b" },
-    { "source": "b", "target": "c" }
+    { "source": "a", "target": "b", "weight": 1 },
+    { "source": "b", "target": "c", "weight": 1 }
   ]
 }
 ```

index.js

@@ -311,7 +311,8 @@ module.exports = function Graph(serialized){
       adjacent(source).forEach(function (target){
         serialized.links.push({
           source: source,
-          target: target
+          target: target,
+          weight: getEdgeWeight(source, target)
         });
       });
     });
@@ -322,7 +323,7 @@ module.exports = function Graph(serialized){
   // Deserializes the given serialized graph.
   function deserialize(serialized){
     serialized.nodes.forEach(function (node){ addNode(node.id); });
-    serialized.links.forEach(function (link){ addEdge(link.source, link.target); });
+    serialized.links.forEach(function (link){ addEdge(link.source, link.target, link.weight); });
     return graph;
   }