From 6f45208ab63de75023f50984d465f905e82b0003 Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Fri, 15 Jul 2022 17:12:08 +0900
Subject: enhance(client): RSSティッカーで表示順序をシャッフルできるように
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---
 packages/client/src/scripts/shuffle.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 packages/client/src/scripts/shuffle.ts

(limited to 'packages/client/src/scripts')

diff --git a/packages/client/src/scripts/shuffle.ts b/packages/client/src/scripts/shuffle.ts
new file mode 100644
index 0000000000..05e6cdfbcf
--- /dev/null
+++ b/packages/client/src/scripts/shuffle.ts
@@ -0,0 +1,19 @@
+/**
+ * 配列をシャッフル (破壊的)
+ */
+export function shuffle<T extends any[]>(array: T): T {
+	let currentIndex = array.length, randomIndex;
+
+	// While there remain elements to shuffle.
+	while (currentIndex !== 0) {
+		// Pick a remaining element.
+		randomIndex = Math.floor(Math.random() * currentIndex);
+		currentIndex--;
+
+		// And swap it with the current element.
+		[array[currentIndex], array[randomIndex]] = [
+			array[randomIndex], array[currentIndex]];
+	}
+
+	return array;
+}
-- 
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