From 40735ce76bbe727eb9c87475d71e19506e5aad0d Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Thu, 6 Sep 2018 19:28:52 +0900
Subject: [PATCH 1/9] Fix bug (#2638)

---
 src/games/reversi/core.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/games/reversi/core.ts b/src/games/reversi/core.ts
index 9199efa092..481b5b0f75 100644
--- a/src/games/reversi/core.ts
+++ b/src/games/reversi/core.ts
@@ -110,7 +110,7 @@ export default class Reversi {
 	 * 白石の数
 	 */
 	public get whiteCount() {
-		return count(BLACK, this.board);
+		return count(WHITE, this.board);
 	}
 
 	/**

From a1b026239e8d38ae1c25bdeb59086551bbac0397 Mon Sep 17 00:00:00 2001
From: "greenkeeper[bot]" <greenkeeper[bot]@users.noreply.github.com>
Date: Thu, 6 Sep 2018 19:55:20 +0900
Subject: [PATCH 2/9] fix(package): update @types/ws to version 6.0.1 (#2636)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 60c6a09787..3aa41cd504 100644
--- a/package.json
+++ b/package.json
@@ -80,7 +80,7 @@
 		"@types/webpack": "4.4.11",
 		"@types/webpack-stream": "3.2.10",
 		"@types/websocket": "0.0.40",
-		"@types/ws": "6.0.0",
+		"@types/ws": "6.0.1",
 		"animejs": "2.2.0",
 		"autosize": "4.0.2",
 		"autwh": "0.1.0",

From 5dd2feba9bf12598eb240e3ece1844124392917d Mon Sep 17 00:00:00 2001
From: "greenkeeper[bot]" <greenkeeper[bot]@users.noreply.github.com>
Date: Thu, 6 Sep 2018 19:55:29 +0900
Subject: [PATCH 3/9] fix(package): update @types/minio to version 7.0.0
 (#2626)

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index 3aa41cd504..811a60814a 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
 		"@types/koa-send": "4.1.1",
 		"@types/koa-views": "2.0.3",
 		"@types/koa__cors": "2.2.3",
-		"@types/minio": "6.0.2",
+		"@types/minio": "7.0.0",
 		"@types/mkdirp": "0.5.2",
 		"@types/mocha": "5.2.3",
 		"@types/mongodb": "3.1.4",

From f428372869461cf350c0e0cd21c41312a3e0f56f Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Thu, 6 Sep 2018 20:06:16 +0900
Subject: [PATCH 4/9] Refactor effects function (#2639)

---
 src/games/reversi/core.ts | 90 +++++++++++++--------------------------
 tslint.json               |  1 +
 2 files changed, 30 insertions(+), 61 deletions(-)

diff --git a/src/games/reversi/core.ts b/src/games/reversi/core.ts
index 481b5b0f75..e2a2289f18 100644
--- a/src/games/reversi/core.ts
+++ b/src/games/reversi/core.ts
@@ -238,87 +238,55 @@ export default class Reversi {
 	/**
 	 * 指定のマスに石を置いた時の、反転させられる石を取得します
 	 * @param color 自分の色
-	 * @param pos 位置
+	 * @param initPos 位置
 	 */
-	public effects(color: Color, pos: number): number[] {
+	public effects(color: Color, initPos: number): number[] {
 		const enemyColor = !color;
 
-		// ひっくり返せる石(の位置)リスト
-		let stones: number[] = [];
+		const diffVectors: [number, number][] = [
+			[  0,  -1], // 上
+			[ +1,  -1], // 右上
+			[ +1,   0], // 右
+			[ +1,  +1], // 右下
+			[  0,  +1], // 下
+			[ -1,  +1], // 左下
+			[ -1,   0], // 左
+			[ -1,  -1]  // 左上
+		];
 
-		const initPos = pos;
-
-		// 走査
-		const iterate = (fn: (i: number) => number[]) => {
-			let i = 1;
-			const found = [];
+		const effectsInLine = ([dx, dy]: [number, number]): number[] => {
+			const nextPos = (x: number, y: number): [number, number] => [x + dx, y + dy];
 
+			const found: number[] = []; // 挟めるかもしれない相手の石を入れておく配列
+			let [x, y] = this.transformPosToXy(initPos);
 			while (true) {
-				let [x, y] = fn(i);
-
 				// 座標が指し示す位置がボード外に出たとき
 				if (this.opts.loopedBoard) {
-					if (x <  0             ) x = this.mapWidth  - ((-x) % this.mapWidth);
-					if (y <  0             ) y = this.mapHeight - ((-y) % this.mapHeight);
-					if (x >= this.mapWidth ) x = x % this.mapWidth;
-					if (y >= this.mapHeight) y = y % this.mapHeight;
+					x = ((x % this.mapWidth) + this.mapWidth) % this.mapWidth;
+					y = ((y % this.mapHeight) + this.mapHeight) % this.mapHeight;
 
-					// for debug
-					//if (x < 0 || y < 0 || x >= this.mapWidth || y >= this.mapHeight) {
-					//	console.log(x, y);
-					//}
-
-					// 一周して自分に帰ってきたら
 					if (this.transformXyToPos(x, y) == initPos) {
-						// ↓のコメントアウトを外すと、「現時点で自分の石が隣接していないが、
-						// そこに置いたとするとループして最終的に挟んだことになる」というケースを有効化します。(Test4のマップで違いが分かります)
-						// このケースを有効にした方が良いのか無効にした方が良いのか判断がつかなかったためとりあえず無効としておきます
-						// (あと無効な方がゲームとしておもしろそうだった)
-						stones = stones.concat(found);
-						break;
+						// 盤面の境界でループし、自分が石を置く位置に戻ってきたとき、挟めるようにしている (ref: Test4のマップ)
+						return found;
 					}
 				} else {
-					if (x == -1 || y == -1 || x == this.mapWidth || y == this.mapHeight) break;
+					if (x == -1 || y == -1 || x == this.mapWidth || y == this.mapHeight) {
+						return []; // 挟めないことが確定 (盤面外に到達)
+					}
 				}
 
 				const pos = this.transformXyToPos(x, y);
-
-				//#region 「配置不能」マスに当たった場合走査終了
-				const pixel = this.mapDataGet(pos);
-				if (pixel == 'null') break;
-				//#endregion
-
-				// 石取得
+				if (this.mapDataGet(pos) === 'null') return []; // 挟めないことが確定 (配置不可能なマスに到達)
 				const stone = this.board[pos];
+				if (stone === null) return []; // 挟めないことが確定 (石が置かれていないマスに到達)
+				if (stone === enemyColor) found.push(pos); // 挟めるかもしれない (相手の石を発見)
+				if (stone === color) return found; // 挟めることが確定 (対となる自分の石を発見)
 
-				// 石が置かれていないマスなら走査終了
-				if (stone === null) break;
-
-				// 相手の石なら「ひっくり返せるかもリスト」に入れておく
-				if (stone === enemyColor) found.push(pos);
-
-				// 自分の石なら「ひっくり返せるかもリスト」を「ひっくり返せるリスト」に入れ、走査終了
-				if (stone === color) {
-					stones = stones.concat(found);
-					break;
-				}
-
-				i++;
+				[x, y] = nextPos(x, y);
 			}
 		};
 
-		const [x, y] = this.transformPosToXy(pos);
-
-		iterate(i => [x    , y - i]); // 上
-		iterate(i => [x + i, y - i]); // 右上
-		iterate(i => [x + i, y    ]); // 右
-		iterate(i => [x + i, y + i]); // 右下
-		iterate(i => [x    , y + i]); // 下
-		iterate(i => [x - i, y + i]); // 左下
-		iterate(i => [x - i, y    ]); // 左
-		iterate(i => [x - i, y - i]); // 左上
-
-		return stones;
+		return [].concat(...diffVectors.map(effectsInLine));
 	}
 
 	/**
diff --git a/tslint.json b/tslint.json
index ae0df46b96..1adc0a2aed 100644
--- a/tslint.json
+++ b/tslint.json
@@ -17,6 +17,7 @@
 		"no-empty":false,
 		"ordered-imports": [false],
 		"arrow-parens": false,
+		"array-type": false,
 		"object-literal-shorthand": false,
 		"object-literal-key-quotes": false,
 		"triple-equals": [false],

From 3cace734c70c752c57ed9a0057aef4d7ef788528 Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Thu, 6 Sep 2018 21:31:15 +0900
Subject: [PATCH 5/9] Add concat function (#2640)

---
 src/client/app/desktop/views/pages/welcome.vue | 5 +++--
 src/client/app/mobile/views/pages/welcome.vue  | 5 +++--
 src/games/reversi/core.ts                      | 4 ++--
 src/prelude/array.ts                           | 8 ++++++--
 4 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/src/client/app/desktop/views/pages/welcome.vue b/src/client/app/desktop/views/pages/welcome.vue
index 0138fde273..7409f6c9b6 100644
--- a/src/client/app/desktop/views/pages/welcome.vue
+++ b/src/client/app/desktop/views/pages/welcome.vue
@@ -85,6 +85,7 @@
 <script lang="ts">
 import Vue from 'vue';
 import { host, copyright } from '../../../config';
+import { concat } from '../../../../../prelude/array';
 
 export default Vue.extend({
 	data() {
@@ -119,8 +120,8 @@ export default Vue.extend({
 		(this as any).api('notes/local-timeline', {
 			fileType: image,
 			limit: 6
-		}).then(notes => {
-			const files = [].concat(...notes.map(n => n.files));
+		}).then((notes: any[]) => {
+			const files = concat(notes.map((n: any): any[] => n.files));
 			this.photos = files.filter(f => image.includes(f.type)).slice(0, 6);
 		});
 	},
diff --git a/src/client/app/mobile/views/pages/welcome.vue b/src/client/app/mobile/views/pages/welcome.vue
index 1856731d8a..7446cc700f 100644
--- a/src/client/app/mobile/views/pages/welcome.vue
+++ b/src/client/app/mobile/views/pages/welcome.vue
@@ -40,6 +40,7 @@
 <script lang="ts">
 import Vue from 'vue';
 import { apiUrl, copyright, host } from '../../../config';
+import { concat } from '../../../../../prelude/array';
 
 export default Vue.extend({
 	data() {
@@ -79,8 +80,8 @@ export default Vue.extend({
 		(this as any).api('notes/local-timeline', {
 			fileType: image,
 			limit: 6
-		}).then(notes => {
-			const files = [].concat(...notes.map(n => n.files));
+		}).then((notes: any[]) => {
+			const files = concat(notes.map((n: any): any[] => n.files));
 			this.photos = files.filter(f => image.includes(f.type)).slice(0, 6);
 		});
 	}
diff --git a/src/games/reversi/core.ts b/src/games/reversi/core.ts
index e2a2289f18..3ca9d052af 100644
--- a/src/games/reversi/core.ts
+++ b/src/games/reversi/core.ts
@@ -1,4 +1,4 @@
-import { count, countIf } from "../../prelude/array";
+import { count, concat } from "../../prelude/array";
 
 // MISSKEY REVERSI ENGINE
 
@@ -286,7 +286,7 @@ export default class Reversi {
 			}
 		};
 
-		return [].concat(...diffVectors.map(effectsInLine));
+		return concat(diffVectors.map(effectsInLine));
 	}
 
 	/**
diff --git a/src/prelude/array.ts b/src/prelude/array.ts
index aee17640ed..9a3c266d6d 100644
--- a/src/prelude/array.ts
+++ b/src/prelude/array.ts
@@ -6,6 +6,10 @@ export function count<T>(x: T, xs: T[]): number {
 	return countIf(y => x === y, xs);
 }
 
-export function intersperse<T>(sep: T, xs: T[]): T[] {
-	return [].concat(...xs.map(x => [sep, x])).slice(1);
+export function concat<T>(xss: T[][]): T[] {
+	return ([] as T[]).concat(...xss);
+}
+
+export function intersperse<T>(sep: T, xs: T[]): T[] {
+	return concat(xs.map(x => [sep, x])).slice(1);
 }

From 00d79487cd89f3cae675ecc0392c47ba547b69a5 Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Fri, 7 Sep 2018 00:02:55 +0900
Subject: [PATCH 6/9] Add erase function (#2641)

---
 .../app/common/scripts/streaming/stream-manager.ts       | 3 ++-
 src/client/app/common/views/components/poll-editor.vue   | 3 ++-
 src/client/app/desktop/views/components/post-form.vue    | 3 ++-
 src/client/app/mios.ts                                   | 3 ++-
 src/client/app/mobile/views/components/post-form.vue     | 3 ++-
 src/client/app/store.ts                                  | 7 ++++---
 src/client/app/sw.js                                     | 4 ++--
 src/prelude/array.ts                                     | 4 ++++
 src/server/api/endpoints/hashtags/trend.ts               | 4 ++--
 src/server/api/endpoints/notes/search_by_tag.ts          | 9 +++++----
 src/services/note/create.ts                              | 7 ++++---
 11 files changed, 31 insertions(+), 19 deletions(-)

diff --git a/src/client/app/common/scripts/streaming/stream-manager.ts b/src/client/app/common/scripts/streaming/stream-manager.ts
index 568b8b0372..8dd06f67d3 100644
--- a/src/client/app/common/scripts/streaming/stream-manager.ts
+++ b/src/client/app/common/scripts/streaming/stream-manager.ts
@@ -1,6 +1,7 @@
 import { EventEmitter } from 'eventemitter3';
 import * as uuid from 'uuid';
 import Connection from './stream';
+import { erase } from '../../../../../prelude/array';
 
 /**
  * ストリーム接続を管理するクラス
@@ -89,7 +90,7 @@ export default abstract class StreamManager<T extends Connection> extends EventE
 	 * @param userId use で発行したユーザーID
 	 */
 	public dispose(userId) {
-		this.users = this.users.filter(id => id != userId);
+		this.users = erase(userId, this.users);
 
 		this._connection.user = `Managed (${ this.users.length })`;
 
diff --git a/src/client/app/common/views/components/poll-editor.vue b/src/client/app/common/views/components/poll-editor.vue
index 115c934c8b..30d9799fec 100644
--- a/src/client/app/common/views/components/poll-editor.vue
+++ b/src/client/app/common/views/components/poll-editor.vue
@@ -20,6 +20,7 @@
 
 <script lang="ts">
 import Vue from 'vue';
+import { erase } from '../../../../../prelude/array';
 export default Vue.extend({
 	data() {
 		return {
@@ -53,7 +54,7 @@ export default Vue.extend({
 
 		get() {
 			return {
-				choices: this.choices.filter(choice => choice != '')
+				choices: erase('', this.choices)
 			}
 		},
 
diff --git a/src/client/app/desktop/views/components/post-form.vue b/src/client/app/desktop/views/components/post-form.vue
index f6f52c8f1f..65dc9eb9c2 100644
--- a/src/client/app/desktop/views/components/post-form.vue
+++ b/src/client/app/desktop/views/components/post-form.vue
@@ -62,6 +62,7 @@ import getFace from '../../../common/scripts/get-face';
 import MkVisibilityChooser from '../../../common/views/components/visibility-chooser.vue';
 import parse from '../../../../../mfm/parse';
 import { host } from '../../../config';
+import { erase } from '../../../../../prelude/array';
 
 export default Vue.extend({
 	components: {
@@ -346,7 +347,7 @@ export default Vue.extend({
 		},
 
 		removeVisibleUser(user) {
-			this.visibleUsers = this.visibleUsers.filter(u => u != user);
+			this.visibleUsers = erase(user, this.visibleUsers);
 		},
 
 		post() {
diff --git a/src/client/app/mios.ts b/src/client/app/mios.ts
index c2ec7f1750..0f72cd2f34 100644
--- a/src/client/app/mios.ts
+++ b/src/client/app/mios.ts
@@ -17,6 +17,7 @@ import Err from './common/views/components/connect-failed.vue';
 import { LocalTimelineStreamManager } from './common/scripts/streaming/local-timeline';
 import { HybridTimelineStreamManager } from './common/scripts/streaming/hybrid-timeline';
 import { GlobalTimelineStreamManager } from './common/scripts/streaming/global-timeline';
+import { erase } from '../../prelude/array';
 
 //#region api requests
 let spinner = null;
@@ -537,7 +538,7 @@ export default class MiOS extends EventEmitter {
 	}
 
 	public unregisterStreamConnection(connection: Connection) {
-		this.connections = this.connections.filter(c => c != connection);
+		this.connections = erase(connection, this.connections);
 	}
 }
 
diff --git a/src/client/app/mobile/views/components/post-form.vue b/src/client/app/mobile/views/components/post-form.vue
index 644e27cce8..8107c1f3a7 100644
--- a/src/client/app/mobile/views/components/post-form.vue
+++ b/src/client/app/mobile/views/components/post-form.vue
@@ -59,6 +59,7 @@ import MkVisibilityChooser from '../../../common/views/components/visibility-cho
 import getFace from '../../../common/scripts/get-face';
 import parse from '../../../../../mfm/parse';
 import { host } from '../../../config';
+import { erase } from '../../../../../prelude/array';
 
 export default Vue.extend({
 	components: {
@@ -262,7 +263,7 @@ export default Vue.extend({
 		},
 
 		removeVisibleUser(user) {
-			this.visibleUsers = this.visibleUsers.filter(u => u != user);
+			this.visibleUsers = erase(user, this.visibleUsers);
 		},
 
 		clear() {
diff --git a/src/client/app/store.ts b/src/client/app/store.ts
index 53f3eefc08..08dd9f9920 100644
--- a/src/client/app/store.ts
+++ b/src/client/app/store.ts
@@ -4,6 +4,7 @@ import * as nestedProperty from 'nested-property';
 
 import MiOS from './mios';
 import { hostname } from './config';
+import { erase } from '../../prelude/array';
 
 const defaultSettings = {
 	home: null,
@@ -195,7 +196,7 @@ export default (os: MiOS) => new Vuex.Store({
 
 				removeDeckColumn(state, id) {
 					state.deck.columns = state.deck.columns.filter(c => c.id != id);
-					state.deck.layout = state.deck.layout.map(ids => ids.filter(x => x != id));
+					state.deck.layout = state.deck.layout.map(ids => erase(id, ids));
 					state.deck.layout = state.deck.layout.filter(ids => ids.length > 0);
 				},
 
@@ -266,7 +267,7 @@ export default (os: MiOS) => new Vuex.Store({
 
 				stackLeftDeckColumn(state, id) {
 					const i = state.deck.layout.findIndex(ids => ids.indexOf(id) != -1);
-					state.deck.layout = state.deck.layout.map(ids => ids.filter(x => x != id));
+					state.deck.layout = state.deck.layout.map(ids => erase(id, ids));
 					const left = state.deck.layout[i - 1];
 					if (left) state.deck.layout[i - 1].push(id);
 					state.deck.layout = state.deck.layout.filter(ids => ids.length > 0);
@@ -274,7 +275,7 @@ export default (os: MiOS) => new Vuex.Store({
 
 				popRightDeckColumn(state, id) {
 					const i = state.deck.layout.findIndex(ids => ids.indexOf(id) != -1);
-					state.deck.layout = state.deck.layout.map(ids => ids.filter(x => x != id));
+					state.deck.layout = state.deck.layout.map(ids => erase(id, ids));
 					state.deck.layout.splice(i + 1, 0, [id]);
 					state.deck.layout = state.deck.layout.filter(ids => ids.length > 0);
 				},
diff --git a/src/client/app/sw.js b/src/client/app/sw.js
index ac7ea20acf..d381bfb7a5 100644
--- a/src/client/app/sw.js
+++ b/src/client/app/sw.js
@@ -3,6 +3,7 @@
  */
 
 import composeNotification from './common/scripts/compose-notification';
+import { erase } from '../../prelude/array';
 
 // キャッシュするリソース
 const cachee = [
@@ -24,8 +25,7 @@ self.addEventListener('activate', ev => {
 	// Clean up old caches
 	ev.waitUntil(
 		caches.keys().then(keys => Promise.all(
-			keys
-				.filter(key => key != _VERSION_)
+			erase(_VERSION_, keys)
 				.map(key => caches.delete(key))
 		))
 	);
diff --git a/src/prelude/array.ts b/src/prelude/array.ts
index 9a3c266d6d..a2a6bbd4c6 100644
--- a/src/prelude/array.ts
+++ b/src/prelude/array.ts
@@ -13,3 +13,7 @@ export function concat<T>(xss: T[][]): T[] {
 export function intersperse<T>(sep: T, xs: T[]): T[] {
 	return concat(xs.map(x => [sep, x])).slice(1);
 }
+
+export function erase<T>(x: T, xs: T[]): T[] {
+	return xs.filter(y => x !== y);
+}
diff --git a/src/server/api/endpoints/hashtags/trend.ts b/src/server/api/endpoints/hashtags/trend.ts
index 01dfccc71c..e7c08ca9f0 100644
--- a/src/server/api/endpoints/hashtags/trend.ts
+++ b/src/server/api/endpoints/hashtags/trend.ts
@@ -1,4 +1,5 @@
 import Note from '../../../../models/note';
+import { erase } from '../../../../prelude/array';
 
 /*
 トレンドに載るためには「『直近a分間のユニーク投稿数が今からa分前～今からb分前の間のユニーク投稿数のn倍以上』のハッシュタグの上位5位以内に入る」ことが必要
@@ -85,8 +86,7 @@ export default () => new Promise(async (res, rej) => {
 	//#endregion
 
 	// タグを人気順に並べ替え
-	let hots = (await Promise.all(hotsPromises))
-		.filter(x => x != null)
+	let hots = erase(null, await Promise.all(hotsPromises))
 		.sort((a, b) => b.count - a.count)
 		.map(tag => tag.name)
 		.slice(0, max);
diff --git a/src/server/api/endpoints/notes/search_by_tag.ts b/src/server/api/endpoints/notes/search_by_tag.ts
index 82f11a9775..77082c2600 100644
--- a/src/server/api/endpoints/notes/search_by_tag.ts
+++ b/src/server/api/endpoints/notes/search_by_tag.ts
@@ -5,6 +5,7 @@ import Mute from '../../../../models/mute';
 import { getFriendIds } from '../../common/get-friends';
 import { pack } from '../../../../models/note';
 import getParams from '../../get-params';
+import { erase } from '../../../../prelude/array';
 
 export const meta = {
 	desc: {
@@ -103,23 +104,23 @@ export default (params: any, me: ILocalUser) => new Promise(async (res, rej) =>
 	if (psErr) throw psErr;
 
 	if (ps.includeUserUsernames != null) {
-		const ids = (await Promise.all(ps.includeUserUsernames.map(async (username) => {
+		const ids = erase(null, await Promise.all(ps.includeUserUsernames.map(async (username) => {
 			const _user = await User.findOne({
 				usernameLower: username.toLowerCase()
 			});
 			return _user ? _user._id : null;
-		}))).filter(id => id != null);
+		})));
 
 		ids.forEach(id => ps.includeUserIds.push(id));
 	}
 
 	if (ps.excludeUserUsernames != null) {
-		const ids = (await Promise.all(ps.excludeUserUsernames.map(async (username) => {
+		const ids = erase(null, await Promise.all(ps.excludeUserUsernames.map(async (username) => {
 			const _user = await User.findOne({
 				usernameLower: username.toLowerCase()
 			});
 			return _user ? _user._id : null;
-		}))).filter(id => id != null);
+		})));
 
 		ids.forEach(id => ps.excludeUserIds.push(id));
 	}
diff --git a/src/services/note/create.ts b/src/services/note/create.ts
index 11e3755863..4759497c63 100644
--- a/src/services/note/create.ts
+++ b/src/services/note/create.ts
@@ -24,6 +24,7 @@ import isQuote from '../../misc/is-quote';
 import { TextElementMention } from '../../mfm/parse/elements/mention';
 import { TextElementHashtag } from '../../mfm/parse/elements/hashtag';
 import { updateNoteStats } from '../update-chart';
+import { erase } from '../../prelude/array';
 
 type NotificationType = 'reply' | 'renote' | 'quote' | 'mention';
 
@@ -103,7 +104,7 @@ export default async (user: IUser, data: Option, silent = false) => new Promise<
 	if (data.viaMobile == null) data.viaMobile = false;
 
 	if (data.visibleUsers) {
-		data.visibleUsers = data.visibleUsers.filter(x => x != null);
+		data.visibleUsers = erase(null, data.visibleUsers);
 	}
 
 	if (data.reply && data.reply.deletedAt != null) {
@@ -547,13 +548,13 @@ async function extractMentionedUsers(tokens: ReturnType<typeof parse>): Promise<
 	)];
 
 	const mentionedUsers = [...new Set(
-		(await Promise.all(mentionTokens.map(async m => {
+		erase(null, await Promise.all(mentionTokens.map(async m => {
 			try {
 				return await resolveUser(m.username, m.host);
 			} catch (e) {
 				return null;
 			}
-		}))).filter(x => x != null)
+		})))
 	)];
 
 	return mentionedUsers;

From e34b264af2e859d9615d6d5308b7fe1bb1b00be8 Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Fri, 7 Sep 2018 00:03:44 +0900
Subject: [PATCH 7/9] Fix bug (#2643)

---
 src/games/reversi/core.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/games/reversi/core.ts b/src/games/reversi/core.ts
index 3ca9d052af..e724917fbf 100644
--- a/src/games/reversi/core.ts
+++ b/src/games/reversi/core.ts
@@ -260,6 +260,8 @@ export default class Reversi {
 			const found: number[] = []; // 挟めるかもしれない相手の石を入れておく配列
 			let [x, y] = this.transformPosToXy(initPos);
 			while (true) {
+				[x, y] = nextPos(x, y);
+
 				// 座標が指し示す位置がボード外に出たとき
 				if (this.opts.loopedBoard) {
 					x = ((x % this.mapWidth) + this.mapWidth) % this.mapWidth;
@@ -281,8 +283,6 @@ export default class Reversi {
 				if (stone === null) return []; // 挟めないことが確定 (石が置かれていないマスに到達)
 				if (stone === enemyColor) found.push(pos); // 挟めるかもしれない (相手の石を発見)
 				if (stone === color) return found; // 挟めることが確定 (対となる自分の石を発見)
-
-				[x, y] = nextPos(x, y);
 			}
 		};
 

From ff0a05a2d67f45ec9ff06d50c5be821d559c2528 Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Fri, 7 Sep 2018 00:10:03 +0900
Subject: [PATCH 8/9] Add unique function (#2644)

---
 src/prelude/array.ts        |  4 ++++
 src/services/note/create.ts | 12 ++++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/prelude/array.ts b/src/prelude/array.ts
index a2a6bbd4c6..abef6ca039 100644
--- a/src/prelude/array.ts
+++ b/src/prelude/array.ts
@@ -17,3 +17,7 @@ export function intersperse<T>(sep: T, xs: T[]): T[] {
 export function erase<T>(x: T, xs: T[]): T[] {
 	return xs.filter(y => x !== y);
 }
+
+export function unique<T>(xs: T[]): T[] {
+	return [...new Set(xs)];
+}
diff --git a/src/services/note/create.ts b/src/services/note/create.ts
index 4759497c63..c08836c94b 100644
--- a/src/services/note/create.ts
+++ b/src/services/note/create.ts
@@ -24,7 +24,7 @@ import isQuote from '../../misc/is-quote';
 import { TextElementMention } from '../../mfm/parse/elements/mention';
 import { TextElementHashtag } from '../../mfm/parse/elements/hashtag';
 import { updateNoteStats } from '../update-chart';
-import { erase } from '../../prelude/array';
+import { erase, unique } from '../../prelude/array';
 
 type NotificationType = 'reply' | 'renote' | 'quote' | 'mention';
 
@@ -385,7 +385,7 @@ function extractHashtags(tokens: ReturnType<typeof parse>): string[] {
 		.map(t => (t as TextElementHashtag).hashtag)
 		.filter(tag => tag.length <= 100);
 
-	return [...new Set(hashtags)];
+	return unique(hashtags);
 }
 
 function index(note: INote) {
@@ -542,12 +542,12 @@ function incNotesCount(user: IUser) {
 async function extractMentionedUsers(tokens: ReturnType<typeof parse>): Promise<IUser[]> {
 	if (tokens == null) return [];
 
-	const mentionTokens = [...new Set(
+	const mentionTokens = unique(
 		tokens
 			.filter(t => t.type == 'mention') as TextElementMention[]
-	)];
+	);
 
-	const mentionedUsers = [...new Set(
+	const mentionedUsers = unique(
 		erase(null, await Promise.all(mentionTokens.map(async m => {
 			try {
 				return await resolveUser(m.username, m.host);
@@ -555,7 +555,7 @@ async function extractMentionedUsers(tokens: ReturnType<typeof parse>): Promise<
 				return null;
 			}
 		})))
-	)];
+	);
 
 	return mentionedUsers;
 }

From 5cd6a0db165247d1c3349c7bda166d0c2bc0e994 Mon Sep 17 00:00:00 2001
From: Aya Morisawa <AyaMorisawa4869@gmail.com>
Date: Fri, 7 Sep 2018 00:44:57 +0900
Subject: [PATCH 9/9] Fix typo: serive -> service (#2647)

---
 src/client/app/boot.js                            | 2 +-
 src/client/app/common/scripts/check-for-update.ts | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/client/app/boot.js b/src/client/app/boot.js
index dd2cf93a89..f14cebe7d5 100644
--- a/src/client/app/boot.js
+++ b/src/client/app/boot.js
@@ -140,7 +140,7 @@
 		// Random
 		localStorage.setItem('salt', Math.random().toString());
 
-		// Clear cache (serive worker)
+		// Clear cache (service worker)
 		try {
 			navigator.serviceWorker.controller.postMessage('clear');
 
diff --git a/src/client/app/common/scripts/check-for-update.ts b/src/client/app/common/scripts/check-for-update.ts
index 4445eefc39..91b165b45d 100644
--- a/src/client/app/common/scripts/check-for-update.ts
+++ b/src/client/app/common/scripts/check-for-update.ts
@@ -9,7 +9,7 @@ export default async function(mios: MiOS, force = false, silent = false) {
 		localStorage.setItem('should-refresh', 'true');
 		localStorage.setItem('v', newer);
 
-		// Clear cache (serive worker)
+		// Clear cache (service worker)
 		try {
 			if (navigator.serviceWorker.controller) {
 				navigator.serviceWorker.controller.postMessage('clear');