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feat: 优化洗牌算法为O(n)的洗牌算法

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zjeff 2022-09-21 19:17:16 +08:00
parent b3b5737e5c
commit 8b3960e976
1 changed files with 11 additions and 1 deletions
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12
src/App.tsx
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@ -83,9 +83,19 @@ const makeScene: (level: number, icons: Icon[]) => Scene = (level, icons) => {
return scene;
};
// o(n) 时间复杂度的洗牌算法
const fastShuffle: <T = any>(arr: T[]) => T[] = (arr) => {
const res = arr.slice();
for (let i = 0; i < res.length; i++) {
const idx = (Math.random() * res.length) >> 0;
[res[i], res[idx]] = [res[idx], res[i]];
}
return res;
};
// 洗牌
const washScene: (level: number, scene: Scene) => Scene = (level, scene) => {
const updateScene = scene.slice().sort(() => Math.random() - 0.5);
const updateScene = fastShuffle(scene);
const offsetPool = [0, 25, -25, 50, -50].slice(0, 1 + level);
const range = [
[2, 6],