gahusb
53e8b592f0
Fisher-Yates 셔플, 카드 픽 생성, 참고 블록/메타데이터 빌더 구현. Task 4(interpret API)·Task 6(UI)에서 소비됨. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
19 lines
556 B
TypeScript
19 lines
556 B
TypeScript
import type { TarotCard } from './cards';
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export type Pick = { card: TarotCard; position: string; reversed: boolean };
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export function fisherYates<T>(input: T[]): T[] {
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const a = [...input];
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for (let i = a.length - 1; i > 0; i -= 1) {
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const j = Math.floor(Math.random() * (i + 1));
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[a[i], a[j]] = [a[j], a[i]];
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}
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return a;
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}
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export function buildShuffle(deck: TarotCard[], size: number): (TarotCard & { reversed: boolean })[] {
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return fisherYates(deck)
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.slice(0, size)
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.map((c) => ({ ...c, reversed: Math.random() < 0.5 }));
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}
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