How can we group hour arrays according to hours. As you see, an hour has multiple minute, like 22:37, 22:52. I want to create new array like It contains two days hours. I tried like this But it gives me this result Answer Update Solution for several days:
Tag: group-by
MongoDB get sum of fields in last stage of aggregate
I’m using an aggregate to gather some related data. The following is a sample pipeline that joins a Parent Collection to a Children One (Each Parent will have a Child). I then use a projection to gather some fields from both collections. This includes getting a count of the “number of sodas” a child has. Ultimately, I’m aiming to get
Grouping array of objects by multiple keys
I feel embarrassed for asking this question as I should know how to figure it out, but I’m spinning my wheels on grouping an array of objects by multiple keys. Here’s the data: What I’ve been trying to generate with little success is the following: The schema is: I’ve tried the following with lodash This gets me part of the