CODEWITHSUNDEEP
arraysswift
Phontaine Judd
Phontaine Judd

Reputation: 438

Filter non-Integers and them sum a 2d array

Quick question. My array is thus:

OutsideIncome(userName: "Beth", allOthers: 0, babysitting: 0, houseCleaning: 0, mowingLawns: 0, summerJobs: 0),
OutsideIncome(userName: "Molly", allOthers: 0, babysitting: 0, houseCleaning: 0, mowingLawns: 0, summerJobs: 0)

One element is a String, and the rest are Ints. How would I go about getting the sum of the Ints?

Code I've tried:

#1: FOR LOOP - didn't work

for item in OutsideIncome.incomeArray.filter({ $0.userName != self.currentUserName }).reduce(0 , { $0 + $1 }) {
    tempOutsideIncome = item.allOthers + item.babysitting + item.houseCleaning + item.mowingLawns + item.summerJobs
}

#2: FILTER REDUCE - didn't work

let outsideIncome = OutsideIncome.incomeArray.filter({ $0.userName != self.currentUserName })
outsideIncome.reduce(0, { $0 + $1 })

#3: FILTER - works but is cumbersome. There has to be a simpler way.

let tempArray = OutsideIncome.incomeArray.filter({ $0.userName == self.currentUserName })
let tempOutsideSum = (tempArray.first?.allOthers)! + (tempArray.first?.babysitting)! + (tempArray.first?.houseCleaning)! + (tempArray.first?.mowingLawns)! + (tempArray.first?.summerJobs)!

I'm thinking there's some way to map it or filter reduce it, but I can't figure it out.

Anyone have a solution?

UPDATE:

Thanks for the answer. My final code:

struct OutsideIncome {
    let userName: String
    let allOthers: Int
    let babysitting: Int
    let houseCleaning: Int
    let mowingLawns: Int
    let summerJobs: Int

    // create 'computed property'
    var totalJobs: Int {
        return allOthers +
            babysitting +
            houseCleaning +
            mowingLawns +
        summerJobs
    }
}

let currentUserName = "Beth"

let array = [OutsideIncome(userName: "Beth", allOthers: 1, babysitting: 0, houseCleaning: 0, mowingLawns: 0, summerJobs: 0),
OutsideIncome(userName: "Molly", allOthers: 0, babysitting: 0, houseCleaning: 0, mowingLawns: 0, summerJobs: 0)]

let result = array.filter({ $0.userName == user.firstName }).reduce(0, { $0 + $1.totalJobs })
}

Upvotes: 0

Views: 32

Answers (1)

Kimdv
Kimdv

Reputation: 310

Create a computed property

    var totalJobs: Int {
    return allOthers +
        babysitting +
        houseCleaning +
        mowingLawns +
    summerJobs
}

Then you can chain filter and reduce 

let result = array.filter { $0.userName ==  currentUserName}.reduce(0) { (res, item) -> Int in
return res + item.totalJobs

}

Upvotes: 2

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