25 lines
595 B
TypeScript
25 lines
595 B
TypeScript
/*
|
|
* SPDX-FileCopyrightText: syuilo and misskey-project
|
|
* SPDX-License-Identifier: AGPL-3.0-only
|
|
*/
|
|
|
|
/**
|
|
* 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;
|
|
}
|