I'm trying to organize an array of events by year and month. Here is a sample of my data:
const events = [
{
name: "event 1",
year: 2021,
month: 1,
},
{
name: "event 2",
year: 2021,
month: 9,
},
{
name: "event 3",
year: 2021,
month: 1,
},
{
name: "event 4",
year: 2022,
month: 7,
},
]
The desired outcome would be structured like this:
[
{
year: 2021,
month: 1,
events: [
{
name: "event 1"
},
{
name: "event 3"
}
]
},
{
year: 2021,
month: 9,
events: [
{
name: "event 2"
}
]
}
]
I'm looking for the best method to achieve this task. I've come across some stackoverflow posts about grouping arrays by key value, but that's not quite what I need.
const groupBy = (array, key) => {
return array.reduce((result, currentValue) => {
// If an array already present for key, push it to the array. Else create an array and push the object
(result[currentValue[key]] = result[currentValue[key]] || []).push(currentValue);
// Return the current iteration `result` value, this will be taken as next iteration `result` value and accumulate
return result;
}, {}); // empty object is the initial value for result object
};
const groupedByYear = groupBy(events, 'year');