javascript中是否有合并多个对象的函数或方法？

我有一个我查询的postgres数据库，它从我的查询中返回一组对象 我使用的堆栈是node express、javascript，我使用WebSocket捕获数据传输。我正试图将这些对象编译回 这是我从数据库获取数据后使用的代码

`socket.on('get2GTPmatch', function(team2){
  for(var i = 0; i<team2.rows.length; i++){
    console.log(team2.rows[i]);
  }
});'




Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 3, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 3, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 3, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 2, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 2, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 1, assists: 2}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fer", kills: 4, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 1, assists: 1}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "coldzera", kills: 3, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "FALLEN", kills: 1, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "coldzera", kills: 2, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 1, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fnx", kills: 1, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "FALLEN", kills: 0, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fer", kills: 1, deaths: 0, assists: 1}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "TACO", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "fnx", kills: 0, deaths: 0, assists: 0}
Object {name: "Luminosity", alias: "FALLEN", kills: 2, deaths: 1, assists: 0}
Object {name: "Luminosity", alias: "coldzera", kills: 0, deaths: 1, assists: 0}

`socket.on（'get2GTPmatch'，函数（team2）{
对于（var i=0；i可能使用Object.assign（）方法：

var objs_merged={}；
socket.on（'get2GTPmatch'，函数（team2）{
对于（变量i=0；i

如果您希望有一个具有汇总属性的对象，那么使用数据库查询会容易得多

client.query(
    "SELECT teams.name AS team, players.alias, SUM(kills) AS kills, SUM(deaths) AS deaths, SUM(assists) AS assists FROM rounds \
    JOIN player_rounds ON rounds.id=player_rounds.round_id \
    JOIN players ON player_rounds.player_id=players.steam_id \
    JOIN teams ON players.team=teams.id \
    WHERE rounds.game_id='B3Il5v' \
    GROUP BY players.alias, teams.name\
    ORDER BY teams.name",
    function(err,results){
      if(err) {
        return console.error('error occurred');
      }
      // console.log(results);
      socket.emit('getKDAmatch', results)

}))

事实上，我在SQL group by上遇到了一个问题。当我刚刚使用group by teams.name时，出于某种原因，它会抛出一个错误。
简单地迭代对象并从中填充新对象的值有什么错？相关问题：你能更具体一点吗？对不起，我对javascript还是很陌生。我会使用.forEach循环吗？@powerup7考虑一下在任何其他语言中都会如何操作。浏览
team2.rows
，每次发现名称和别名的新组合时都创建一个新对象，更新kill、别名等的对应值。每次遇到具有相同名称和别名的对象时，都使用集合或映射来查询f或者名称/别名组合。我当时是通过一个很长的sql查询完成的。我只需要休息一下，每天10个小时都不要乱动脑筋。：）很高兴你找到了答案。通过查询进行分组和求和要容易得多。
client.query(
    "SELECT teams.name AS team, players.alias, SUM(kills) AS kills, SUM(deaths) AS deaths, SUM(assists) AS assists FROM rounds \
    JOIN player_rounds ON rounds.id=player_rounds.round_id \
    JOIN players ON player_rounds.player_id=players.steam_id \
    JOIN teams ON players.team=teams.id \
    WHERE rounds.game_id='B3Il5v' \
    GROUP BY players.alias, teams.name\
    ORDER BY teams.name",
    function(err,results){
      if(err) {
        return console.error('error occurred');
      }
      // console.log(results);
      socket.emit('getKDAmatch', results)