Working on 4w 3

hw3/d3.js

@@ -5390,8 +5390,8 @@ function contours() {
   // Marching squares with isolines stitched into rings.
   // Based on https://github.com/topojson/topojson-client/blob/v3.0.0/src/stitch.js
   function isorings(values, value, callback) {
-    var fragmentByStart = new Array,
-        fragmentByEnd = new Array,
+    var fragmentByStart = [],
+        fragmentByEnd = [],
         x, y, t0, t1, t2, t3;
 
     // Special case for the first row (y = -1, t2 = t3 = 0).

hw3/script.js

@@ -24,7 +24,7 @@ function update(data) {
         .range([0, 150]);
     let bScale = d3.scaleLinear()
         .domain([0, d3.max(data, d => d.b)])
-        .range([0, 150]);
+        .range([0, 150]
     let iScale = d3.scaleLinear()
         .domain([0, data.length])
         .range([0, 110]);