From 9384f5399da39e53855beb8e7f8ded1aa56bf72e Mon Sep 17 00:00:00 2001
From: syuilo <Syuilotan@yahoo.co.jp>
Date: Tue, 27 Dec 2022 14:36:33 +0900
Subject: rename: client -> frontend

---
 packages/frontend/src/scripts/shuffle.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 packages/frontend/src/scripts/shuffle.ts

(limited to 'packages/frontend/src/scripts/shuffle.ts')

diff --git a/packages/frontend/src/scripts/shuffle.ts b/packages/frontend/src/scripts/shuffle.ts
new file mode 100644
index 0000000000..05e6cdfbcf
--- /dev/null
+++ b/packages/frontend/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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