[gnome-shell] cleanup: Use Array.includes() to check for element existence



commit f6b4b96737d36a138de4b4350ef59df4a944e379
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jul 14 22:56:22 2018 +0200

    cleanup: Use Array.includes() to check for element existence
    
    We can use that newer method where we don't care about the actual position
    of an element inside the array.
    
    (Array.includes() and Array.indexOf() do behave differently in edge cases,
    for example in the handling of NaN, but those don't matter to us)
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/152

 js/extensionPrefs/main.js          | 4 ++--
 js/misc/extensionUtils.js          | 2 +-
 js/misc/keyboardManager.js         | 2 +-
 js/ui/appDisplay.js                | 8 ++++----
 js/ui/calendar.js                  | 2 +-
 js/ui/components/__init__.js       | 4 ++--
 js/ui/components/autorunManager.js | 8 ++++----
 js/ui/components/networkAgent.js   | 4 ++--
 js/ui/components/polkitAgent.js    | 4 ++--
 js/ui/dash.js                      | 4 ++--
 js/ui/endSessionDialog.js          | 2 +-
 js/ui/extensionDownloader.js       | 2 +-
 js/ui/extensionSystem.js           | 2 +-
 js/ui/grabHelper.js                | 2 +-
 js/ui/inhibitShortcutsDialog.js    | 2 +-
 js/ui/keyboard.js                  | 2 +-
 js/ui/main.js                      | 4 ++--
 js/ui/messageList.js               | 2 +-
 js/ui/messageTray.js               | 6 +++---
 js/ui/padOsd.js                    | 7 +++----
 js/ui/panel.js                     | 4 ++--
 js/ui/remoteSearch.js              | 4 ++--
 js/ui/runDialog.js                 | 2 +-
 js/ui/sessionMode.js               | 2 +-
 js/ui/status/network.js            | 4 ++--
 js/ui/status/volume.js             | 2 +-
 js/ui/windowManager.js             | 4 ++--
 js/ui/workspace.js                 | 2 +-
 js/ui/workspaceThumbnail.js        | 2 +-
 29 files changed, 49 insertions(+), 50 deletions(-)
---
diff --git a/js/extensionPrefs/main.js b/js/extensionPrefs/main.js
index 43efa95e9..24ecdc165 100644
--- a/js/extensionPrefs/main.js
+++ b/js/extensionPrefs/main.js
@@ -582,12 +582,12 @@ class ExtensionRow extends Gtk.ListBoxRow {
 
     _isEnabled() {
         let extensions = this._settings.get_strv('enabled-extensions');
-        return extensions.indexOf(this.uuid) != -1;
+        return extensions.includes(this.uuid);
     }
 
     _enable() {
         let extensions = this._settings.get_strv('enabled-extensions');
-        if (extensions.indexOf(this.uuid) != -1)
+        if (extensions.includes(this.uuid))
             return;
 
         extensions.push(this.uuid);
diff --git a/js/misc/extensionUtils.js b/js/misc/extensionUtils.js
index cf308b31f..89a085d68 100644
--- a/js/misc/extensionUtils.js
+++ b/js/misc/extensionUtils.js
@@ -31,7 +31,7 @@ function getCurrentExtension() {
     // Search for an occurrence of an extension stack frame
     // Start at 1 because 0 is the stack frame of this function
     for (let i = 1; i < stack.length; i++) {
-        if (stack[i].indexOf('/gnome-shell/extensions/') > -1) {
+        if (stack[i].includes('/gnome-shell/extensions/')) {
             extensionStackLine = stack[i];
             break;
         }
diff --git a/js/misc/keyboardManager.js b/js/misc/keyboardManager.js
index 99e100231..ae71b646e 100644
--- a/js/misc/keyboardManager.js
+++ b/js/misc/keyboardManager.js
@@ -125,7 +125,7 @@ var KeyboardManager = class {
 
     _getLocaleLayout() {
         let locale = GLib.get_language_names()[0];
-        if (locale.indexOf('_') == -1)
+        if (!locale.includes('_'))
             locale = DEFAULT_LOCALE;
 
         let [found, , id] = GnomeDesktop.get_input_source_from_locale(locale);
diff --git a/js/ui/appDisplay.js b/js/ui/appDisplay.js
index ea86c81b9..00019772a 100644
--- a/js/ui/appDisplay.js
+++ b/js/ui/appDisplay.js
@@ -69,7 +69,7 @@ function _getCategories(info) {
 
 function _listsIntersect(a, b) {
     for (let itemA of a)
-        if (b.indexOf(itemA) >= 0)
+        if (b.includes(itemA))
             return true;
     return false;
 }
@@ -1165,7 +1165,7 @@ var FolderIcon = class FolderIcon {
         let excludedApps = this._folder.get_strv('excluded-apps');
         let appSys = Shell.AppSystem.get_default();
         let addAppId = appId => {
-            if (excludedApps.indexOf(appId) >= 0)
+            if (excludedApps.includes(appId))
                 return;
 
             let app = appSys.lookup_app(appId);
@@ -1728,7 +1728,7 @@ var AppIconMenu = class AppIconMenu extends PopupMenu.PopupMenu {
             let appInfo = this._source.app.get_app_info();
             let actions = appInfo.list_actions();
             if (this._source.app.can_open_new_window() &&
-                actions.indexOf('new-window') == -1) {
+                actions.includes('new-window')) {
                 this._newWindowMenuItem = this._appendMenuItem(_("New Window"));
                 this._newWindowMenuItem.connect('activate', () => {
                     if (this._source.app.state == Shell.AppState.STOPPED)
@@ -1742,7 +1742,7 @@ var AppIconMenu = class AppIconMenu extends PopupMenu.PopupMenu {
 
             if (discreteGpuAvailable &&
                 this._source.app.state == Shell.AppState.STOPPED &&
-                actions.indexOf('activate-discrete-gpu') == -1) {
+                actions.includes('activate-discrete-gpu')) {
                 this._onDiscreteGpuMenuItem = this._appendMenuItem(_("Launch using Dedicated Graphics 
Card"));
                 this._onDiscreteGpuMenuItem.connect('activate', () => {
                     if (this._source.app.state == Shell.AppState.STOPPED)
diff --git a/js/ui/calendar.js b/js/ui/calendar.js
index cd3e879c4..d7c5bc805 100644
--- a/js/ui/calendar.js
+++ b/js/ui/calendar.js
@@ -38,7 +38,7 @@ function isToday(date) {
 function _isWorkDay(date) {
     /* Translators: Enter 0-6 (Sunday-Saturday) for non-work days. Examples: "0" (Sunday) "6" (Saturday) 
"06" (Sunday and Saturday). */
     let days = C_('calendar-no-work', "06");
-    return days.indexOf(date.getDay().toString()) == -1;
+    return !days.includes(date.getDay().toString());
 }
 
 function _getBeginningOfDay(date) {
diff --git a/js/ui/components/__init__.js b/js/ui/components/__init__.js
index 6d6cc9d69..652f6951c 100644
--- a/js/ui/components/__init__.js
+++ b/js/ui/components/__init__.js
@@ -13,13 +13,13 @@ var ComponentManager = class {
         let newEnabledComponents = Main.sessionMode.components;
 
         newEnabledComponents.filter(
-            name => this._enabledComponents.indexOf(name) == -1
+            name => !this._enabledComponents.includes(name)
         ).forEach(name => {
             this._enableComponent(name);
         });
 
         this._enabledComponents.filter(
-            name => newEnabledComponents.indexOf(name) == -1
+            name => !newEnabledComponents.includes(name)
         ).forEach(name => {
             this._disableComponent(name);
         });
diff --git a/js/ui/components/autorunManager.js b/js/ui/components/autorunManager.js
index 34c7d6250..4891e5d95 100644
--- a/js/ui/components/autorunManager.js
+++ b/js/ui/components/autorunManager.js
@@ -40,7 +40,7 @@ function isMountRootHidden(root) {
     let path = root.get_path();
 
     // skip any mounts in hidden directory hierarchies
-    return (path.indexOf('/.') != -1);
+    return (path.includes('/.'));
 }
 
 function isMountNonLocal(mount) {
@@ -192,15 +192,15 @@ var AutorunDispatcher = class {
 
     _getAutorunSettingForType(contentType) {
         let runApp = this._settings.get_strv(SETTING_START_APP);
-        if (runApp.indexOf(contentType) != -1)
+        if (runApp.includes(contentType))
             return AutorunSetting.RUN;
 
         let ignore = this._settings.get_strv(SETTING_IGNORE);
-        if (ignore.indexOf(contentType) != -1)
+        if (ignore.includes(contentType))
             return AutorunSetting.IGNORE;
 
         let openFiles = this._settings.get_strv(SETTING_OPEN_FOLDER);
-        if (openFiles.indexOf(contentType) != -1)
+        if (openFiles.includes(contentType))
             return AutorunSetting.FILES;
 
         return AutorunSetting.ASK;
diff --git a/js/ui/components/networkAgent.js b/js/ui/components/networkAgent.js
index 48bbd308f..dca8318ed 100644
--- a/js/ui/components/networkAgent.js
+++ b/js/ui/components/networkAgent.js
@@ -327,7 +327,7 @@ class NetworkSecretDialog extends ModalDialog.ModalDialog {
             this._getPPPoESecrets(content.secrets);
             break;
         case 'gsm':
-            if (this._hints.indexOf('pin') != -1) {
+            if (this._hints.includes('pin')) {
                 let gsmSetting = this._connection.get_setting_gsm();
                 content.title = _("PIN code required");
                 content.message = _("PIN code is needed for the mobile broadband device");
@@ -695,7 +695,7 @@ var NetworkAgent = class {
             body = _("A password is required to connect to “%s”.".format(connection.get_id()));
             break;
         case 'gsm':
-            if (hints.indexOf('pin') != -1) {
+            if (hints.includes('pin')) {
                 let gsmSetting = connection.get_setting_gsm();
                 title = _("PIN code required");
                 body = _("PIN code is needed for the mobile broadband device");
diff --git a/js/ui/components/polkitAgent.js b/js/ui/components/polkitAgent.js
index 27566531f..a44165df9 100644
--- a/js/ui/components/polkitAgent.js
+++ b/js/ui/components/polkitAgent.js
@@ -45,9 +45,9 @@ var AuthenticationDialog = GObject.registerClass({
         }
 
         let userName = GLib.get_user_name();
-        if (userNames.indexOf(userName) < 0)
+        if (!userNames.includes(userName))
             userName = 'root';
-        if (userNames.indexOf(userName) < 0)
+        if (!userNames.includes(userName))
             userName = userNames[0];
 
         this._user = AccountsService.UserManager.get_default().get_user(userName);
diff --git a/js/ui/dash.js b/js/ui/dash.js
index 0032c912e..878045410 100644
--- a/js/ui/dash.js
+++ b/js/ui/dash.js
@@ -700,14 +700,14 @@ var Dash = class Dash {
             }
 
             // App removed at oldIndex
-            if (oldApp && newApps.indexOf(oldApp) == -1) {
+            if (oldApp && !newApps.includes(oldApp)) {
                 removedActors.push(children[oldIndex]);
                 oldIndex++;
                 continue;
             }
 
             // App added at newIndex
-            if (newApp && oldApps.indexOf(newApp) == -1) {
+            if (newApp && !oldApps.includes(newApp)) {
                 addedItems.push({ app: newApp,
                                   item: this._createAppItem(newApp),
                                   pos: newIndex });
diff --git a/js/ui/endSessionDialog.js b/js/ui/endSessionDialog.js
index d83578fb9..3c7729eb3 100644
--- a/js/ui/endSessionDialog.js
+++ b/js/ui/endSessionDialog.js
@@ -585,7 +585,7 @@ class EndSessionDialog extends ModalDialog.ModalDialog {
     }
 
     _onInhibitorLoaded(inhibitor) {
-        if (this._applications.indexOf(inhibitor) < 0) {
+        if (!this._applications.includes(inhibitor)) {
             // Stale inhibitor
             return;
         }
diff --git a/js/ui/extensionDownloader.js b/js/ui/extensionDownloader.js
index 184db2464..fb36ac478 100644
--- a/js/ui/extensionDownloader.js
+++ b/js/ui/extensionDownloader.js
@@ -228,7 +228,7 @@ class InstallExtensionDialog extends ModalDialog.ModalDialog {
         function callback() {
             // Add extension to 'enabled-extensions' for the user, always...
             let enabledExtensions = global.settings.get_strv(ExtensionSystem.ENABLED_EXTENSIONS_KEY);
-            if (enabledExtensions.indexOf(uuid) == -1) {
+            if (!enabledExtensions.includes(uuid)) {
                 enabledExtensions.push(uuid);
                 global.settings.set_strv(ExtensionSystem.ENABLED_EXTENSIONS_KEY, enabledExtensions);
             }
diff --git a/js/ui/extensionSystem.js b/js/ui/extensionSystem.js
index 6244c39b4..744f5e7ac 100644
--- a/js/ui/extensionSystem.js
+++ b/js/ui/extensionSystem.js
@@ -169,7 +169,7 @@ function loadExtension(extension) {
     if (checkVersion && ExtensionUtils.isOutOfDate(extension)) {
         extension.state = ExtensionState.OUT_OF_DATE;
     } else {
-        let enabled = enabledExtensions.indexOf(extension.uuid) != -1;
+        let enabled = enabledExtensions.includes(extension.uuid);
         if (enabled) {
             if (!initExtension(extension.uuid))
                 return;
diff --git a/js/ui/grabHelper.js b/js/ui/grabHelper.js
index 509915019..39873e16f 100644
--- a/js/ui/grabHelper.js
+++ b/js/ui/grabHelper.js
@@ -87,7 +87,7 @@ var GrabHelper = class GrabHelper {
     _isWithinGrabbedActor(actor) {
         let currentActor = this.currentGrab.actor;
         while (actor) {
-            if (this._actors.indexOf(actor) != -1)
+            if (this._actors.includes(actor))
                 return true;
             if (actor == currentActor)
                 return true;
diff --git a/js/ui/inhibitShortcutsDialog.js b/js/ui/inhibitShortcutsDialog.js
index 170cd1a33..6c988577c 100644
--- a/js/ui/inhibitShortcutsDialog.js
+++ b/js/ui/inhibitShortcutsDialog.js
@@ -111,7 +111,7 @@ var InhibitShortcutsDialog = GObject.registerClass({
     }
 
     vfunc_show() {
-        if (this._app && APP_WHITELIST.indexOf(this._app.get_id()) != -1) {
+        if (this._app && APP_WHITELIST.includes(this._app.get_id())) {
             this._emitResponse(DialogResponse.ALLOW);
             return;
         }
diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index b6a26663a..c30f90a76 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -1074,7 +1074,7 @@ var Keyboard = class Keyboard {
                 let manager = Clutter.DeviceManager.get_default();
                 let device = manager.get_device(deviceId);
 
-                if (device.get_device_name().indexOf('XTEST') < 0) {
+                if (!device.get_device_name().includes('XTEST')) {
                     this._lastDeviceId = deviceId;
                     this._syncEnabled();
                 }
diff --git a/js/ui/main.js b/js/ui/main.js
index 04f333ea1..9b6986001 100644
--- a/js/ui/main.js
+++ b/js/ui/main.js
@@ -663,7 +663,7 @@ function initializeDeferredWork(actor, callback, props) {
     _deferredWorkData[workId] = { 'actor': actor,
                                   'callback': callback };
     actor.connect('notify::mapped', () => {
-        if (!(actor.mapped && _deferredWorkQueue.indexOf(workId) >= 0))
+        if (!(actor.mapped && _deferredWorkQueue.includes(workId)))
             return;
         _queueBeforeRedraw(workId);
     });
@@ -693,7 +693,7 @@ function queueDeferredWork(workId) {
         logError(new Error(message), message);
         return;
     }
-    if (_deferredWorkQueue.indexOf(workId) < 0)
+    if (!_deferredWorkQueue.includes(workId))
         _deferredWorkQueue.push(workId);
     if (data.actor.mapped) {
         _queueBeforeRedraw(workId);
diff --git a/js/ui/messageList.js b/js/ui/messageList.js
index bd97ffcb0..93c3fc3ac 100644
--- a/js/ui/messageList.js
+++ b/js/ui/messageList.js
@@ -72,7 +72,7 @@ var URLHighlighter = class URLHighlighter {
             let urlId = this._findUrlAtPos(event);
             if (urlId != -1) {
                 let url = this._urls[urlId].url;
-                if (url.indexOf(':') == -1)
+                if (!url.includes(':'))
                     url = 'http://' + url;
 
                 Gio.app_info_launch_default_for_uri(url, global.create_app_launch_context(0, -1));
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index f1f79d8c2..4007f1b00 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -228,7 +228,7 @@ class NotificationApplicationPolicy extends NotificationPolicy {
         this._settings.set_string('application-id', this.id + '.desktop');
 
         let apps = this._masterSettings.get_strv('application-children');
-        if (apps.indexOf(this._canonicalId) < 0) {
+        if (!apps.includes(this._canonicalId)) {
             apps.push(this._canonicalId);
             this._masterSettings.set_strv('application-children', apps);
         }
@@ -772,7 +772,7 @@ var Source = class Source {
     }
 
     pushNotification(notification) {
-        if (this.notifications.indexOf(notification) >= 0)
+        if (this.notifications.includes(notification))
             return;
 
         while (this.notifications.length >= MAX_NOTIFICATIONS_PER_SOURCE)
@@ -1069,7 +1069,7 @@ var MessageTray = class MessageTray {
             // If a new notification is updated while it is being hidden,
             // we stop hiding it and show it again.
             this._updateShowingNotification();
-        } else if (this._notificationQueue.indexOf(notification) < 0) {
+        } else if (!this._notificationQueue.includes(notification)) {
             // If the queue is "full", we skip banner mode and just show a small
             // indicator in the panel; however do make an exception for CRITICAL
             // notifications, as only banner mode allows expansion.
diff --git a/js/ui/padOsd.js b/js/ui/padOsd.js
index a4af47297..903b967c4 100644
--- a/js/ui/padOsd.js
+++ b/js/ui/padOsd.js
@@ -630,7 +630,7 @@ var PadOsd = class {
             // If the device is being removed, destroy the padOsd.
             if (device == this.padDevice) {
                 this.destroy();
-            } else if (this._groupPads.indexOf(device) != -1) {
+            } else if (this._groupPads.includes(device)) {
                 // Or update the pad chooser if the device belongs to
                 // the same group.
                 this._groupPads.splice(this._groupPads.indexOf(device), 1);
@@ -749,8 +749,7 @@ var PadOsd = class {
     }
 
     _requestForOtherPad(pad) {
-        if (pad == this.padDevice ||
-            this._groupPads.indexOf(pad) == -1)
+        if (pad == this.padDevice || !this._groupPads.includes(pad))
             return;
 
         let editionMode = this._editionMode;
@@ -801,7 +800,7 @@ var PadOsd = class {
 
         // If the event comes from another pad in the same group,
         // show the OSD for it.
-        if (this._groupPads.indexOf(event.get_source_device()) != -1) {
+        if (this._groupPads.includes(event.get_source_device())) {
             this._requestForOtherPad(event.get_source_device());
             return Clutter.EVENT_STOP;
         }
diff --git a/js/ui/panel.js b/js/ui/panel.js
index be02785a8..fbd65a263 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -1056,9 +1056,9 @@ class Panel extends St.Widget {
         this._updateBox(panel.center, this._centerBox);
         this._updateBox(panel.right, this._rightBox);
 
-        if (panel.left.indexOf('dateMenu') != -1)
+        if (panel.left.includes('dateMenu'))
             Main.messageTray.bannerAlignment = Clutter.ActorAlign.START;
-        else if (panel.right.indexOf('dateMenu') != -1)
+        else if (panel.right.includes('dateMenu'))
             Main.messageTray.bannerAlignment = Clutter.ActorAlign.END;
         // Default to center if there is no dateMenu
         else
diff --git a/js/ui/remoteSearch.js b/js/ui/remoteSearch.js
index ce8c4d09b..ae6c6dab7 100644
--- a/js/ui/remoteSearch.js
+++ b/js/ui/remoteSearch.js
@@ -146,10 +146,10 @@ function loadRemoteSearchProviders(searchSettings, callback) {
 
         if (provider.defaultEnabled) {
             let disabled = searchSettings.get_strv('disabled');
-            return disabled.indexOf(appId) == -1;
+            return !disabled.includes(appId);
         } else {
             let enabled = searchSettings.get_strv('enabled');
-            return enabled.indexOf(appId) != -1;
+            return enabled.includes(appId);
         }
     });
 
diff --git a/js/ui/runDialog.js b/js/ui/runDialog.js
index 9186ff7bb..21bd04c3e 100644
--- a/js/ui/runDialog.js
+++ b/js/ui/runDialog.js
@@ -182,7 +182,7 @@ class RunDialog extends ModalDialog.ModalDialog {
     }
 
     _getCompletion(text) {
-        if (text.indexOf('/') != -1) {
+        if (text.includes('/')) {
             return this._pathCompleter.get_completion_suffix(text);
         } else {
             return this._getCommandCompletion(text);
diff --git a/js/ui/sessionMode.js b/js/ui/sessionMode.js
index ae6c64dd3..70a6e8a15 100644
--- a/js/ui/sessionMode.js
+++ b/js/ui/sessionMode.js
@@ -128,7 +128,7 @@ function _loadMode(file, info) {
     let propBlacklist = ['unlockDialog'];
     for (let prop in _modes[DEFAULT_MODE]) {
         if (newMode[prop] !== undefined &&
-            propBlacklist.indexOf(prop) == -1)
+            !propBlacklist.includes(prop))
             _modes[modeName][prop] = newMode[prop];
     }
     _modes[modeName]['isPrimary'] = true;
diff --git a/js/ui/status/network.js b/js/ui/status/network.js
index 7c2499d0e..8ad451347 100644
--- a/js/ui/status/network.js
+++ b/js/ui/status/network.js
@@ -1040,7 +1040,7 @@ class NMWirelessDialog extends ModalDialog.ModalDialog {
     _checkConnections(network, accessPoint) {
         this._connections.forEach(connection => {
             if (accessPoint.connection_valid(connection) &&
-                network.connections.indexOf(connection) == -1) {
+                !network.connections.includes(connection)) {
                 network.connections.push(connection);
             }
         });
@@ -1059,7 +1059,7 @@ class NMWirelessDialog extends ModalDialog.ModalDialog {
 
         if (pos != -1) {
             network = this._networks[pos];
-            if (network.accessPoints.indexOf(accessPoint) != -1) {
+            if (network.accessPoints.includes(accessPoint)) {
                 log('Access point was already seen, not adding again');
                 return;
             }
diff --git a/js/ui/status/volume.js b/js/ui/status/volume.js
index ae2497a93..cc270500b 100644
--- a/js/ui/status/volume.js
+++ b/js/ui/status/volume.js
@@ -215,7 +215,7 @@ var OutputStreamSlider = class extends StreamSlider {
         // of different identifiers for headphones, and I could
         // not find the complete list
         if (sink.get_ports().length > 0)
-            return sink.get_port().port.indexOf('headphone') >= 0;
+            return sink.get_port().port.includes('headphone');
 
         return false;
     }
diff --git a/js/ui/windowManager.js b/js/ui/windowManager.js
index 19dc263cd..d016f3371 100644
--- a/js/ui/windowManager.js
+++ b/js/ui/windowManager.js
@@ -1288,7 +1288,7 @@ var WindowManager = class {
             return false;
 
         let type = actor.meta_window.get_window_type();
-        return types.indexOf(type) >= 0;
+        return types.includes(type);
     }
 
     _removeEffect(list, actor) {
@@ -1501,7 +1501,7 @@ var WindowManager = class {
     _sizeChangedWindow(shellwm, actor) {
         if (!actor.__animationInfo)
             return;
-        if (this._resizing.indexOf(actor) != -1)
+        if (this._resizing.includes(actor))
             return;
 
         let actorClone = actor.__animationInfo.clone;
diff --git a/js/ui/workspace.js b/js/ui/workspace.js
index 50ac141d9..1b6c63eb3 100644
--- a/js/ui/workspace.js
+++ b/js/ui/workspace.js
@@ -536,7 +536,7 @@ var WindowOverlay = class {
         let [cloneX, cloneY, cloneWidth, cloneHeight] = this._windowClone.slot;
 
         let layout = Meta.prefs_get_button_layout();
-        let side = layout.left_buttons.indexOf(Meta.ButtonFunction.CLOSE) > -1 ? St.Side.LEFT : 
St.Side.RIGHT;
+        let side = layout.left_buttons.includes(Meta.ButtonFunction.CLOSE) ? St.Side.LEFT : St.Side.RIGHT;
 
         let buttonX;
         let buttonY = cloneY - (button.height - button._overlap);
diff --git a/js/ui/workspaceThumbnail.js b/js/ui/workspaceThumbnail.js
index 969167178..be196c04b 100644
--- a/js/ui/workspaceThumbnail.js
+++ b/js/ui/workspaceThumbnail.js
@@ -378,7 +378,7 @@ var WorkspaceThumbnail = class {
             return;
         }
 
-        if (this._allWindows.indexOf(metaWin) == -1) {
+        if (!this._allWindows.includes(metaWin)) {
             let minimizedChangedId = metaWin.connect('notify::minimized',
                                                      this._updateMinimized.bind(this));
             this._allWindows.push(metaWin);


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