diff --git a/lib/components/comic.dart b/lib/components/comic.dart
index cf3f4a2..28c4a23 100644
--- a/lib/components/comic.dart
+++ b/lib/components/comic.dart
@@ -742,7 +742,7 @@ class _SliverGridComicsState extends State<SliverGridComics> {
 
   @override
   void didUpdateWidget(covariant SliverGridComics oldWidget) {
-    if (oldWidget.comics.isEqualsTo(widget.comics)) {
+    if (oldWidget.comics.isEqualTo(widget.comics)) {
       comics.clear();
       for (var comic in widget.comics) {
         if (isBlocked(comic) == null) {
diff --git a/lib/pages/categories_page.dart b/lib/pages/categories_page.dart
index 78f46c3..f46d975 100644
--- a/lib/pages/categories_page.dart
+++ b/lib/pages/categories_page.dart
@@ -32,7 +32,7 @@ class _CategoriesPageState extends State<CategoriesPage> {
         .toList();
     categories =
         categories.where((element) => allCategories.contains(element)).toList();
-    if (!categories.isEqualsTo(this.categories)) {
+    if (!categories.isEqualTo(this.categories)) {
       setState(() {
         this.categories = categories;
       });
diff --git a/lib/pages/explore_page.dart b/lib/pages/explore_page.dart
index 421be80..21a32e9 100644
--- a/lib/pages/explore_page.dart
+++ b/lib/pages/explore_page.dart
@@ -37,7 +37,7 @@ class _ExplorePageState extends State<ExplorePage>
         .expand((e) => e.map((e) => e.title))
         .toList();
     explorePages = explorePages.where((e) => all.contains(e)).toList();
-    if (!pages.isEqualsTo(explorePages)) {
+    if (!pages.isEqualTo(explorePages)) {
       setState(() {
         pages = explorePages;
         controller = TabController(
diff --git a/lib/pages/search_page.dart b/lib/pages/search_page.dart
index 6258e0d..81d7466 100644
--- a/lib/pages/search_page.dart
+++ b/lib/pages/search_page.dart
@@ -189,7 +189,7 @@ class _SearchPageState extends State<SearchPage> {
   void updateSearchSourcesIfNeeded() {
     var old = searchSources;
     findSearchSources();
-    if (old.isEqualsTo(searchSources)) {
+    if (old.isEqualTo(searchSources)) {
       return;
     }
     setState(() {});
diff --git a/lib/pages/search_result_page.dart b/lib/pages/search_result_page.dart
index a0251ee..e7cff3d 100644
--- a/lib/pages/search_result_page.dart
+++ b/lib/pages/search_result_page.dart
@@ -196,7 +196,7 @@ class _SearchResultPageState extends State<SearchResultPage> {
               return _SearchSettingsDialog(state: this);
             },
           );
-          if (!previousOptions.isEqualsTo(options) ||
+          if (!previousOptions.isEqualTo(options) ||
               previousSourceKey != sourceKey) {
             text = checkAutoLanguage(controller.text);
             controller.currentText = text;
diff --git a/lib/utils/ext.dart b/lib/utils/ext.dart
index 5a9e534..c4fa3ed 100644
--- a/lib/utils/ext.dart
+++ b/lib/utils/ext.dart
@@ -25,7 +25,9 @@ extension ListExt<T> on List<T>{
     }
   }
 
-  bool isEqualsTo(List<T> list){
+  /// Compare every element of this list with another list.
+  /// Return true if all elements are equal.
+  bool isEqualTo(List<T> list){
     if(length != list.length){
       return false;
     }
@@ -81,10 +83,6 @@ extension StringExt on String{
     return '$before$to$after';
   }
 
-  static bool hasMatch(String? value, String pattern) {
-    return (value == null) ? false : RegExp(pattern).hasMatch(value);
-  }
-
   bool _isURL(){
     final regex = RegExp(
         r'^((http|https|ftp)://)[\w-]+(\.[\w-]+)+([\w.,@?^=%&:/~+#-|]*[\w@?^=%&/~+#-])?$',