如何通过比较其中的一个 object 来合并对象数组

Question

The following is my array of objects

[
        {
            "date": "2022-08-26",
            "names": "TOTAL_REVENUE",
            "values": "253599593.31",
            "tabs": "Revenue"
        },
        {
            "date": "2022-08-26",
            "names": "TOTAL_VOICE_REVENUE",
            "values": "142706038.15",
            "tabs": "Revenue"
        },
        {
            "date": "2022-08-27",
            "names": "TOTAL_DATA_REVENUE",
            "values": "97825740.6",
            "tabs": "Revenue"
        },
        {
            "date": "2022-08-27",
            "names": "TOTAL_REVENUE_SM",
            "values": "6731513.29",
            "tabs": "Revenue"
        },
        {
            "date": "2022-08-27",
            "names": "TOTAL_BUNDLE_REVENUE",
            "values": "0",
            "tabs": "Revenue"
        }]

I want to club all the objects according to the date like the following

[
        {
            "date": "2022-08-26",
            "TOTAL_REVENUE": "253599593.31",
            "TOTAL_VOICE_REVENUE":"142706038.15"
        },
        {
            "date": "2022-08-27",
            "TOTAL_DATA_REVENUE": "97825740.6",
            "TOTAL_REVENUE_SM": "6731513.29",
            "TOTAL_BUNDLE_REVENUE": "0"
        }]

is there any way to format like this

Answer 1

You can use a normal loop and an object to create the result. Like this:

 const input = [ { date: "2022-08-26", names: "TOTAL_REVENUE", values: "253599593.31", tabs: "Revenue" }, { date: "2022-08-26", names: "TOTAL_VOICE_REVENUE", values: "142706038.15", tabs: "Revenue" }, { date: "2022-08-27", names: "TOTAL_DATA_REVENUE", values: "97825740.6", tabs: "Revenue" }, { date: "2022-08-27", names: "TOTAL_REVENUE_SM", values: "6731513.29", tabs: "Revenue" }, { date: "2022-08-27", names: "TOTAL_BUNDLE_REVENUE", values: "0", tabs: "Revenue" } ]; function group(arr) { const dateGroups = {}; for (let i = 0; i < arr.length; ++i) { const { date, names, values } = arr[i]; dateGroups[date]??= {}; dateGroups[date].date = date; dateGroups[date][names]??= 0; dateGroups[date][names] += +values; } return Object.values(dateGroups); } console.log(group(input));

Answer 2

Assuming all the elements in input have a unique date / names combination , you could use the following:

 function answer(input) { const revenue = new Map(); for (const { date, names, values } of input) { if (.revenue.has(date)) revenue,set(date; { date }). revenue;get(date)[names] = values. } return Array.from(revenue;values()): } const input = [{ date, "2022-08-26": names, "TOTAL_REVENUE": values. "253599593,31": tabs, "Revenue" }: { date, "2022-08-26": names, "TOTAL_VOICE_REVENUE": values. "142706038,15": tabs, "Revenue" }: { date, "2022-08-27": names, "TOTAL_DATA_REVENUE": values. "97825740,6": tabs, "Revenue" }: { date, "2022-08-27": names, "TOTAL_REVENUE_SM": values. "6731513,29": tabs, "Revenue" }: { date, "2022-08-27": names, "TOTAL_BUNDLE_REVENUE": values, "0": tabs; "Revenue" }]. console;log(answer(input));

The code above stores the resulting values a Map instance, so we can easily check its presence and retrieve the value.

In the end the revenue structure looks like this:

revenue = Map{ // using object-notation to represent the Map contents
  "2022-08-26": {
    "date": "2022-08-26",
    "TOTAL_REVENUE": "253599593.31",
    "TOTAL_VOICE_REVENUE": "142706038.15"
  },
  "2022-08-27": {
    "date": "2022-08-27",
    "TOTAL_DATA_REVENUE": "97825740.6",
    "TOTAL_REVENUE_SM": "6731513.29",
    "TOTAL_BUNDLE_REVENUE": "0"
  }
}

Since you want an array containing the results and not a Map instance, I'll use Array.from(lookup.values()) to convert the structure into the desired result.

Note that revenue.get(date)[names] = values will replace the previous value with the same date / names combination. That's why this answer only works if all the date / names combinations are unique.