javascript - 如何判断哪队获胜，胜则加3分，输则加0，平则加1

Question

我有一系列比赛结果，我需要根据得分确定为球队添加多少分。在本例中，法国队得 3 分，克罗地亚队得 0 分，英格兰队和西类牙队各得 1 分。如何实现这一点，有人可以帮忙吗？

const matches = [
    {
        homeTeam: 'France',
        awayTeam: 'Croatia',
        score: '2:1',
        date: '18.01.2019'
    },
      {
        homeTeam: 'England',
        awayTeam: 'Spain',
        score: '1:1',
        date: '18.01.2019'
    }
];

function getRankings(games) {
    // ...implementation
} 

const footbalRankings = getRankings(matches);
console.log(footbalRankings);

输出应该是这样的:

[
    { team: 'France', points:  3 }
    { team: 'England', points: 1 }
    { team: 'Spain', points: 1 }
    { team: 'Croatia', points: 0 }
]

Answer 1

const matches = [
  {
    homeTeam: 'France',
    awayTeam: 'Croatia',
    score: '2:1',
    date: '18.01.2019'
  }, {
    homeTeam: 'England',
    awayTeam: 'Spain',
    score: '1:1',
    date: '18.01.2019'
  }
];

function getRankings(games) {
  var ranks = {};
  games.forEach(game => {
    var [homeScore, awayScore] = game.score.split(':');
    if (!ranks[game.homeTeam]) ranks[game.homeTeam] = { name: game.homeTeam, points: 0 };
    if (!ranks[game.awayTeam]) ranks[game.awayTeam] = { name: game.awayTeam, points: 0 };
    if (homeScore > awayScore) {
      ranks[game.homeTeam].points += 3;
    } else if (awayScore > homeScore) {
      ranks[game.awayTeam].points += 3;
    } else {
      ranks[game.homeTeam].points++;
      ranks[game.awayTeam].points++;
    }
  });
  return Object.values(ranks).sort((a, b) => a.points > b.points ? -1 : 1);
} 
        
var footbalRankings = getRankings(matches);
console.log(footbalRankings);