我有这样的时间序列:
[
{
"_id": {
"action": "click",
"date": "2015-02-02T00:00:00+01:00"
},
"total": 5
},
{
"_id": {
"action": "hit",
"date": "2015-02-02T00:00:00+01:00"
},
"total": 13
},
{
"_id": {
"action": "hit",
"date": "2015-02-03T00:00:00+01:00"
},
"total": 25
},
{
"_id": {
"action": "click",
"date": "2015-02-03T00:00:00+01:00"
},
"total": 7
}
]
我需要做一些计算并返回一个类似的对象,特别是,我需要找到点击和点击之间的百分比(同一日期的点击/点击数* 100),返回这样的对象:
[
{
"_id": {
"action": "ctr",
"date": "2015-02-02T00:00:00+01:00"
},
"total": 38.46
},
{
"_id": {
"action": "ctr",
"date": "2015-02-03T00:00:00+01:00"
},
"total": 28
}
]
任何提示?
答案 0 :(得分:2)
_.groupBy(array, function(el){ return el._id.date; });
以上是您可以分组的方式,然后您可以映射并计算您需要的内容。例如: