js 实现赛事排名

// 参赛者数据结构
const participants = [
  { name: 'Alice', score: 95 },
  { name: 'Bob', score: 85 },
  { name: 'Charlie', score: 95 },
  { name: 'David', score: 75 },
  { name: 'Eve', score: 85 },
];

// 按分数降序排序
participants.sort((a, b) => b.score - a.score);

// 实现排名
let rank = 1;
let previousScore = null;

participants.forEach((participant, index) => {
  if (index === 0) {
    participant.rank = rank;
  } else {
    if (participant.score === previousScore) {
      participant.rank = rank;
    } else {
      participant.rank = rank + index;
    }
  }
  previousScore = participant.score;
});

console.log(participants);

[
  { name: 'Alice', score: 95, rank: 1 },
  { name: 'Charlie', score: 95, rank: 1 },
  { name: Bob', score: 85, rank: 3 },
  { name: 'Eve', score: 85, rank: 3 },
  { name: 'David', score: 75, rank: 5 },
]