4 ms·
In JS you would also need to check if the key exists first (so you can add it). I think the minimal example would be: const groupByAge = {} for (const
by shhsshs 5y ago
In JS you would also need to check if the key exists first (so you can add it). I think the minimal example would be:
const groupByAge = {}
for (const person in people) {
if (!groupByAge[person.age]) {
groupByAge[person.age] = []
}
groupByAge[person.age].push(person)
}
IMO it is a very nice change to now be able to write:
const groupByAge = people.groupBy(p => p.age)
- SahAssar 5y agoA reduce version seems quite okay to me though, and keeps it pretty functional-styled. const groupByAge = people.reduce((previous, current) => { if (!previous[current.age]) previous[current.age] = [] previous[current.age].push(current) return previous }, {})