Clean up old codes 2

examples/js/src/neighbourSampling-papaparsing.js

@@ -109,9 +109,9 @@ function processData(data, error) {
   console.log("n =", nodes.length);
   // Calculate normalization arguments and get the list of
   // properties of the nodes.
-  norm = calculateNormalization(nodes);
-  props = Object.keys(nodes[0]);
-  COLOR_ATTRIBUTE = props[0];
+  norm = calculateNormalization(nodes); // Used with distance fn
+  props = Object.keys(nodes[0]); // Properties to consider by distance fn
+  COLOR_ATTRIBUTE = props[props.length-1];
 
   var opts = document.getElementById('color_attr').options;
 
@@ -172,7 +172,7 @@ function processData(data, error) {
   function ticked() {
     // If rendering is selected, then draw at every iteration.
     if (rendering === true) {
-      node
+      node // Each sub-circle in the SVG, update cx and cy
         .attr("cx", function (d) {
           return d.x;
         })
@@ -187,7 +187,7 @@ function processData(data, error) {
   }
 
   function ended() {
-    if (rendering !== true) {
+    if (rendering !== true) { // Never drawn anything before? Now it's time.
       node
         .attr("cx", function (d) {
           return d.x;
@@ -485,6 +485,7 @@ function startLinkSimulation() {
   springForce = false;
   simulation.stop();
   p1 = performance.now();
+  let links = [];
 
   // Initialize link array.
   nodes = simulation.nodes();