1 files changed, 28 insertions, 2 deletions
diff --git a/ext/mixed/js/dictionary-data-util.js b/ext/mixed/js/dictionary-data-util.js
index c049d591..8d8772fe 100644
--- a/ext/mixed/js/dictionary-data-util.js
+++ b/ext/mixed/js/dictionary-data-util.js
@@ -52,8 +52,8 @@ class DictionaryDataUtil {
                 const exclusiveExpressions = [];
                 const exclusiveReadings = [];
                 const resultExpressions = result.expressions;
-                if (!areSetsEqual(resultExpressions, allExpressions)) {
-                    exclusiveExpressions.push(...getSetIntersection(resultExpressions, allExpressions));
+                if (!this._areSetsEqual(resultExpressions, allExpressions)) {
+                    exclusiveExpressions.push(...this._getSetIntersection(resultExpressions, allExpressions));
                 }
                 if (multipleReadings) {
                     exclusiveReadings.push(result.reading);
@@ -71,6 +71,8 @@ class DictionaryDataUtil {
         return results2;
     }
 
+    // Private
+
     static _findExistingPitchAccentInfo(reading, position, tags, pitchAccentInfoList) {
         for (const pitchInfo of pitchAccentInfoList) {
             if (
@@ -98,4 +100,28 @@ class DictionaryDataUtil {
 
         return true;
     }
+
+    static _areSetsEqual(set1, set2) {
+        if (set1.size !== set2.size) {
+            return false;
+        }
+
+        for (const value of set1) {
+            if (!set2.has(value)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    static _getSetIntersection(set1, set2) {
+        const result = [];
+        for (const value of set1) {
+            if (set2.has(value)) {
+                result.push(value);
+            }
+        }
+        return result;
+    }
 }