Question

我有一组对象如下：

{"id":136073,"date":"2016-12-13 16:06:55","user":"test1","expt":"ex3","subj":"1481645153775","cond":"Male,Yes","stim":"Peace","resp":0}
{"id":136075,"date":"2016-12-13 16:07:04","user":"test1","expt":"ex3","subj":"1481645035859","cond":"Male,Yes","stim":"Marriage","resp":0}
{"id":136077,"date":"2016-12-13 16:09:55","user":"test1","expt":"ex3","subj":"1481645377779","cond":"Male,Yes","stim":"Alone","resp":0}
{"id":136079,"date":"2016-12-13 16:11:41","user":"test1","expt":"ex3","subj":"1481645377779","cond":"Male,Yes","stim":"Peace","resp":0}
{"id":136145,"date":"2016-12-13 18:49:22","user":"test1","expt":"ex3","subj":"1481654705832","cond":"Male,No","stim":"Alone","resp":-2}
{"id":136147,"date":"2016-12-13 18:49:36","user":"test1","expt":"ex3","subj":"1481654705832","cond":"Male,No","stim":"Peace","resp":0}
{"id":136771,"date":"2016-12-13 22:19:01","user":"test1","expt":"ex3","subj":"1481667464470","cond":"Male,Yes","stim":"Alone","resp":2}

我想将它们分组为一个名为results的数组。

我想为具有相同resp属性值的对象聚合subj属性的值。

到目前为止，我所要做的就是创建一个独特的主题列表来查找，我想将它们存储在它们旁边。

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

  // console.log(JSON.stringify(results[i].subj))

  if (i>0 && test.includes(results[i].subj)){ 

  } else {  
    var total  = test.push(results[i].subj)
    //  var total2  = test.push(results.resp)
    // console.log(JSON.stringify(test))
  }
}

console.log(test)

我有一系列的主题。

我该怎么做

1-找到所有相应的resp's

2-总结他们

3-将它们存放在主题旁边？

Answer 1

为结果创建{}，其中键是主题名称，值是总和。然后列举您的列表并总结它们。使用(res[each['subj']] || 0)来捕获新密钥的情况。

var res = {};
list.forEach(function(each) { 
  res[each['subj']] = (res[each['subj']] || 0) + each['resp']; 
});
console.log(res);

打印

{
  "1481645153775": 0,
  "1481645035859": 0,
  "1481645377779": 0,
  "1481654705832": -2,
  "1481667464470": 2
}

Answer 2

您可以使用哈希表对结果进行分组。

＆＃13;

var results = [{ id: 136073, date: "2016-12-13 16:06:55", user: "test1", expt: "ex3", subj: "1481645153775", cond: "Male,Yes", stim: "Peace", resp: 0 }, { id: 136075, date: "2016-12-13 16:07:04", user: "test1", expt: "ex3", subj: "1481645035859", cond: "Male,Yes", stim: "Marriage", resp: 0 }, { id: 136077, date: "2016-12-13 16:09:55", user: "test1", expt: "ex3", subj: "1481645377779", cond: "Male,Yes", stim: "Alone", resp: 0 }, { id: 136079, date: "2016-12-13 16:11:41", user: "test1", expt: "ex3", subj: "1481645377779", cond: "Male,Yes", stim: "Peace", resp: 0 }, { id: 136145, date: "2016-12-13 18:49:22", user: "test1", expt: "ex3", subj: "1481654705832", cond: "Male,No", stim: "Alone", resp: -2 }, { id: 136147, date: "2016-12-13 18:49:36", user: "test1", expt: "ex3", subj: "1481654705832", cond: "Male,No", stim: "Peace", resp: 0 }, { id: 136771, date: "2016-12-13 22:19:01", user: "test1", expt: "ex3", subj: "1481667464470", cond: "Male,Yes", stim: "Alone", resp: 2 }],
    grouped = [];

results.forEach(function (a) {
    if (!this[a.subj]) {
        this[a.subj] = { subj: a.subj, resp: 0 };
        grouped.push(this[a.subj]);
    }
    this[a.subj].resp += a.resp;
}, Object.create(null));

console.log(grouped);

＆＃13;

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＆＃13;

对应对象的聚合属性值

2 个答案: