I am currently trying to sum some values in an array of objects, based on the Id of another array present in the current array. assuming I have this array
const queryArray = [ "1" , "2" ]
and this is the array I would like to sum if fees property values of the Id matches
const services = [
{
Id: "1",
services: "Early Check-In",
fees: "7500"
},
{
Id: "2",
services: "Late Checkout",
fees: "7500"
},
{
Id: "3",
services: "Airport Chauffeur",
fees: "25000"
}
]
so I will like to get the sum of the fees property value in the services array up here based on the Id available in the queryArray. so in this case
[ "1" , "2" ]
should return
15000
if I decided to use this below
[ "1" , "3" ]
it should return
32500
and if also do
[ "1", "2" , "3"]
it should return
40000
Am new to javascript so I can't even think of any possible solution or the step to take at all.
Sure, filter the services you need -> map service to it's value -> reduce the resulting list to a singe number adding the elements:
const services = [
{
Id: "1",
services: "Early Check-In",
fees: "7500"
},
{
Id: "2",
services: "Late Checkout",
fees: "7500"
},
{
Id: "3",
services: "Airport Chauffeur",
fees: "25000"
}
]
const ids = ["1" , "2"]
console.log(
services
.filter(({Id}) => ids.includes(Id))
.map(({fees}) => parseFloat(fees))
.reduce((acc, fees) => acc + fees, 0)
)Check whether the id is included in the id array inside the reducer:
const services = [
{
Id: "1",
services: "Early Check-In",
fees: "7500"
},
{
Id: "2",
services: "Late Checkout",
fees: "7500"
},
{
Id: "3",
services: "Airport Chauffeur",
fees: "25000"
}
]
const queryArray = [ "1" , "2" ]
const res = services.reduce((a,b) => queryArray.includes(b.Id) ? a += +b.fees : a, 0)
console.log(res)You could also use reduce, and for every entry check if the Id of the current value is in the queryArray. If it is, then return the current total plus the current fees.
Set a 0 as the start value.
const services = [{
Id: "1",
services: "Early Check-In",
fees: "7500"
},
{
Id: "2",
services: "Late Checkout",
fees: "7500"
},
{
Id: "3",
services: "Airport Chauffeur",
fees: "25000"
}
]
const queryArray = ["1", "2"]
let res = services.reduce(
(total, curr) => queryArray.includes(curr.Id) ? total + parseInt(curr.fees, 10) : total,
0
);
console.log(res);