From 60fbbbbfc1c1f77f8d3665b72e6e35008a39d5a5 Mon Sep 17 00:00:00 2001
From: Grant Jenks <grant.jenks@gmail.com>
Date: Sun, 3 Jan 2021 21:40:07 -0800
Subject: [PATCH] Bug fix for handling trigrams

When "this" is the middle of a trigram, it should record the previous symbol in the digram index.
---
 javascript/main.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/javascript/main.js b/javascript/main.js
index 133d816..9a9377f 100644
--- a/javascript/main.js
+++ b/javascript/main.js
@@ -113,7 +113,7 @@ Symbol.prototype.join = function(right) {
     if (this.prev && this.next &&
 	this.value() == this.next.value() &&
 	this.value() == this.prev.value()) {
-      digramIndex[this.hashValue()] = this;
+      digramIndex[this.prev.hashValue()] = this.prev;
     }
   }
   this.next = right;