我在数组下面
const array = [
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'NY', country: 'USA' },
className: 'FourthActivity',
deviceId: '1111111111111111'
},
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'NY', country: 'USA' },
className: 'FourthActivity',
deviceId: '222222222222222'
},
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'Landon', country: 'UK' },
className: 'FourthActivity',
deviceId: '33333333333'
}
]
我必须通过使用对象内部的两个属性(即address
和className
)对它进行分组。如何使用loadash或javascript执行此操作?
预期输出
[{
address: { city: 'NY', country: 'USA' }, className: 'FourthActivity',
count: 2,
data: [{
deviceId: 222222222222222,
}, {
deviceId: 1111111111111111,
}]
}, {
address: { city: 'Landon', country: 'UK' }, className: 'FourthActivity',
count: 1,
data: [{
deviceId: 33333333333,
}]
}]
我已经尝试过了,但是没用
var selectedVehicle = _.filter(array, 'address')
const selectedVehicles = _.groupBy(selectedVehicle, function(item) {
return item.makeCode;
})
console.log(selectedVehicles)
答案 0 :(得分:1)
您可以reduce
到一个对象中,如果给定的地址/ className对尚不存在,则创建{ address, className, count: 0, data: [] }
,然后获取该对象的值:
const array = [
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'NY', country: 'USA' },
className: 'FourthActivity',
deviceId: '1111111111111111'
},
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'NY', country: 'USA' },
className: 'FourthActivity',
deviceId: '222222222222222'
},
{
key: 'TSJUcgLGig2UOdjAzlqq4KW5GK6PKXHC2ndw40HYIss7EKsV6nJ',
location: { lat: '22.7196', lng: '75.8577' },
address: { city: 'Landon', country: 'UK' },
className: 'FourthActivity',
deviceId: '33333333333'
}
]
const output = Object.values(array.reduce((a, { address, className, deviceId }) => {
const addressClassNameStr = JSON.stringify({ address, className });
if (!a[addressClassNameStr]) {
a[addressClassNameStr] = { address, className, count: 0, data: [] };
}
a[addressClassNameStr].count++;
a[addressClassNameStr].data.push({ deviceId });
return a;
}, {}));
console.log(output);