Use in
operator to check for index existance.
The check (key in obj) is more readable than (typeof key[obj] !== 'undefined').
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springy.js
20
springy.js
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@ -49,7 +49,7 @@ var Edge = function(id, source, target, data) {
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};
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Graph.prototype.addNode = function(node) {
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if (typeof(this.nodeSet[node.id]) === 'undefined') {
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if (!(node.id in this.nodeSet)) {
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this.nodes.push(node);
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}
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@ -69,10 +69,10 @@ Graph.prototype.addEdge = function(edge) {
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this.edges.push(edge);
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}
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if (typeof(this.adjacency[edge.source.id]) === 'undefined') {
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if (!(edge.source.id in this.adjacency)) {
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this.adjacency[edge.source.id] = {};
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}
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if (typeof(this.adjacency[edge.source.id][edge.target.id]) === 'undefined') {
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if (!(edge.target.id in this.adjacency[edge.source.id])) {
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this.adjacency[edge.source.id][edge.target.id] = [];
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}
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@ -103,8 +103,8 @@ Graph.prototype.newEdge = function(source, target, data) {
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// find the edges from node1 to node2
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Graph.prototype.getEdges = function(node1, node2) {
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if (typeof(this.adjacency[node1.id]) !== 'undefined'
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&& typeof(this.adjacency[node1.id][node2.id]) !== 'undefined') {
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if (node1.id in this.adjacency
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&& node2.id in this.adjacency[node1.id]) {
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return this.adjacency[node1.id][node2.id];
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}
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@ -113,7 +113,7 @@ Graph.prototype.getEdges = function(node1, node2) {
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// remove a node and it's associated edges from the graph
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Graph.prototype.removeNode = function(node) {
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if (typeof(this.nodeSet[node.id]) !== 'undefined') {
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if (node.id in this.nodeSet) {
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delete this.nodeSet[node.id];
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}
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@ -236,7 +236,7 @@ Layout.ForceDirected = function(graph, stiffness, repulsion, damping) {
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};
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Layout.ForceDirected.prototype.point = function(node) {
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if (typeof(this.nodePoints[node.id]) === 'undefined') {
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if (!(node.id in this.nodePoints)) {
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var mass = (node.data.mass !== undefined) ? node.data.mass : 1.0;
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this.nodePoints[node.id] = new Layout.ForceDirected.Point(Vector.random(), mass);
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}
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@ -245,14 +245,14 @@ Layout.ForceDirected.prototype.point = function(node) {
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};
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Layout.ForceDirected.prototype.spring = function(edge) {
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if (typeof(this.edgeSprings[edge.id]) === 'undefined') {
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if (!(edge.id in this.edgeSprings)) {
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var length = (edge.data.length !== undefined) ? edge.data.length : 1.0;
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var existingSpring = false;
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var from = this.graph.getEdges(edge.source, edge.target);
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from.forEach(function(e) {
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if (existingSpring === false && typeof(this.edgeSprings[e.id]) !== 'undefined') {
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if (existingSpring === false && e.id in this.edgeSprings) {
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existingSpring = this.edgeSprings[e.id];
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}
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}, this);
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@ -263,7 +263,7 @@ Layout.ForceDirected.prototype.spring = function(edge) {
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var to = this.graph.getEdges(edge.target, edge.source);
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from.forEach(function(e){
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if (existingSpring === false && typeof(this.edgeSprings[e.id]) !== 'undefined') {
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if (existingSpring === false && e.id in this.edgeSprings) {
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existingSpring = this.edgeSprings[e.id];
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}
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}, this);
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