diff --git a/posts/2013-01-28-array-comparison.md b/posts/2013-01-28-array-comparison.md
index 3e10bc78..b8ef224d 100644
--- a/posts/2013-01-28-array-comparison.md
+++ b/posts/2013-01-28-array-comparison.md
@@ -1,13 +1,13 @@
 Did you know that JavaScript can compare arrays using lexicographical ordering?
 
-```
+```js
   [1, 2, 4] < [1, 2, 5]  // true
   [1, 3, 4] < [1, 2, 5]  // false
 ```
 
 Just don't expect trichotomy to hold.
 
-```
+```js
   [1, 2, 3] === [1, 2, 3]   // false
   [1, 2, 3] <   [1, 2, 3]   // false
   [1, 2, 3] ==  [1, 2, 3]   // false
@@ -16,7 +16,7 @@ Just don't expect trichotomy to hold.
 
 Oh, and just in case you're wondering, it knows it's messing with you.
 
-```
+```js
   [1, 2, 3] <= [1, 2, 3]   // true
   [1, 2, 3] >= [1, 2, 3]   // true
 ```
@@ -24,3 +24,16 @@ Oh, and just in case you're wondering, it knows it's messing with you.
 — [@pwnall][1]
 
 [1]:https://twitter.com/pwnall
+
+---
+
+By the way, when we say "lexicographical ordering"...
+
+```js
+  [4, 5, 6] < [10, 15, 18] // false
+  [3, 2, 1] > [20, 9999, Infinity] // true
+```
+
+— [@stuartpb][2]
+
+[2]:https://twitter.com/stuartpb