[英]How can I loop through this array of objects in javascript?
我在這里有一個對象數組:
const users = [
{
name: 'xyz',
claims: [
{"location": 'dallas',
"id": '123'},
{"location": 'frisco',
"id": '123'},
{"location": 'plano',
"id": '123'},
]
},
{
name: 'abc',
claims: [
{"location": 'richardson',
"id": '123'},
{"location": 'rowlett',
"id": '123'},
{"location": 'dallas',
"id": '123'},
]
},
{
name: 'adr',
claims: [
{"location": 'frisco',
"id": '123'},
{"location": 'irving',
"id": '123'},
{"location": 'dallas',
"id": '123'},
]
}
]
我想獲得以達拉斯為價值的所有地點。 我怎樣才能做到這一點? 我知道我可能會使用一個循環(也許是一個 forEach),但我不確定如何獲得我需要的值。 我會使用過濾器嗎?
將flatMap
與filter
組合使用:
const dallasLocations = users.flatMap(user => {
return user.claims.filter(claim => claim.location === 'dallas')
})
您可以在過濾等於dallas的位置后使用flatMap
來展平映射的數組。
const users = [ { name: 'xyz', claims: [ {"location": 'dallas', "id": '123'}, {"location": 'frisco', "id": '123'}, {"location": 'plano', "id": '123'}, ] }, { name: 'abc', claims: [ {"location": 'richardson', "id": '123'}, {"location": 'rowlett', "id": '123'}, {"location": 'dallas', "id": '123'}, ] }, { name: 'adr', claims: [ {"location": 'frisco', "id": '123'}, {"location": 'irving', "id": '123'}, {"location": 'dallas', "id": '123'}, ] } ] const result = users.flatMap(u => u.claims.filter(c => c.location === 'dallas')) console.log(result)
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