1 files changed, 70 insertions, 0 deletions
diff --git a/challenge-196/roger-bell-west/javascript/ch-2.js b/challenge-196/roger-bell-west/javascript/ch-2.js
new file mode 100755
index 0000000000..6a6650fa70
--- /dev/null
+++ b/challenge-196/roger-bell-west/javascript/ch-2.js
@@ -0,0 +1,70 @@
+#! /usr/bin/node
+
+"use strict"
+
+// by Frank Tan
+// https://stackoverflow.com/questions/38400594/javascript-deep-comparison
+function deepEqual(a,b)
+{
+    if( (typeof a == 'object' && a != null) &&
+        (typeof b == 'object' && b != null) )
+    {
+        var count = [0,0];
+        for( var key in a) count[0]++;
+        for( var key in b) count[1]++;
+        if( count[0]-count[1] != 0) {return false;}
+        for( var key in a)
+        {
+            if(!(key in b) || !deepEqual(a[key],b[key])) {return false;}
+        }
+        for( var key in b)
+        {
+            if(!(key in a) || !deepEqual(b[key],a[key])) {return false;}
+        }
+        return true;
+    }
+    else
+    {
+        return a === b;
+    }
+}
+
+function rangelist(l) {
+    let o = [];
+    let start = l[0];
+    let prev = start;
+    for (let v of l.slice(1)) {
+        if (v != prev + 1) {
+            if (prev > start) {
+                o.push([start, prev]);
+            }
+            start = v;
+        }
+        prev = v;
+    }
+    if (prev > start) {
+        o.push([start, prev]);
+    }
+    return o;
+}
+
+if (deepEqual(rangelist([1, 3, 4, 5, 7]), [[3, 5]])) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (deepEqual(rangelist([1, 2, 3, 6, 7, 9]), [[1, 3], [6, 7]])) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write(" ");
+
+if (deepEqual(rangelist([0, 1, 2, 4, 5, 6, 8, 9]), [[0, 2], [4, 6], [8, 9]])) {
+    process.stdout.write("Pass");
+} else {
+    process.stdout.write("FAIL");
+}
+process.stdout.write("\n");