累积分数

Question

我在下面的表格中有一组对象。每个对象代表足球比赛的结果。实际的数组包含的记录远远多于我在这里的记录。在每场比赛中，得分最高的球队（主场或客场）获得3分，得分最低的球队获得0分。如果得分相同，则每支球队获得1分。我想创建逻辑，聚合每个独特团队的积分，无论他们是在家还是离开。我想看到不同类型的选项（更新的语法等），尤其是一个vanilla javascript解决方案。

我也计划通过它，但我努力想出任何简洁的东西。

[{
    "_id" : ObjectId("5a4824f3a469a068edc875e2"),
    "homeTeam" : "Team1",
    "homeScore" : 2,
    "awayTeam" : "Team2",
    "awayScore" : 1,
}
{
    "_id" : ObjectId("5a4824f3a469a068edc894e9"),
    "homeTeam" : "Team2",
    "homeScore" : 2,
    "awayTeam" : "Team3",
    "awayScore" : 1,
},{
    "_id" : ObjectId("5a4824f3a469a068edc554e7"),
    "homeTeam" : "Team4",
    "homeScore" : 1,
    "awayTeam" : "Team5",
    "awayScore" : 1,
}]

Answer 1

var data = [{
    "_id" : "5a4824f3a469a068edc875e2",
    "homeTeam" : "Team1",
    "homeScore" : 2,
    "awayTeam" : "Team2",
    "awayScore" : 1,
},
{
    "_id" : "5a4824f3a469a068edc894e9",
    "homeTeam" : "Team2",
    "homeScore" : 2,
    "awayTeam" : "Team3",
    "awayScore" : 1,
},{
    "_id" : "5a4824f3a469a068edc554e7",
    "homeTeam" : "Team4",
    "homeScore" : 1,
    "awayTeam" : "Team5",
    "awayScore" : 1,
}];

var teamStats = {};

var i = 0;
for(;i < data.length; i++) {

    // New Home team
    if(teamStats[data[i].homeTeam] == undefined) {
    teamStats[data[i].homeTeam] = {
        name: data[i].homeTeam,
      score: 0
    }
  }

  // New Away team
  if(teamStats[data[i].awayTeam] == undefined) {
    teamStats[data[i].awayTeam] = {
        name: data[i].awayTeam,
      score: 0
    }
  }

  // Update score
  teamStats[data[i].homeTeam].score += data[i].homeScore;
  teamStats[data[i].awayTeam].score += data[i].awayScore;
}

// teamStats contains a scores of all teams