CODEWITHSUNDEEP
arraysswifttuples
blackdiamondx
blackdiamondx

Reputation: 61

How to get the sum of all Double values in a tuples array?

This is my function and I am trying to get the sum of all the Double values. I tried using += but I got many errors, I would really appreciate any assistance!

 func getSum(myList: [(title: String, id: Int, value: Double)]) -> Double {
    
    var key = Double()

    for i in 0..<myList.count {
         //something over here needs to change
        key = myList[i].value
        
    }

     
    
    return key
}


let myList: [(String, Int, Double)] = [("A", 1, 1.5), ("B", 2, 2.5), ("C", 3, 3.5)] // should return 7.5 (1.5 + 2.5 + 3.5)

Upvotes: -1

Views: 459

Answers (2)

harsh bangari
harsh bangari

Reputation: 495

//Python Version 3.8

from typing import List, Tuple

def get_sum(my_list: List[Tuple[str, int, float]]) -> float:
    total = 0.0
    for _, _, value in my_list:
      total += value
    return total

my_list = [("A", 1, 1.5), ("B", 2, 2.5), ("C", 3, 3.5)]

result = get_sum(my_list)
print(result)   //Output Result 7.5

Online Python Tool: https://www.online-python.com

Upvotes: -2

vadian
vadian

Reputation: 285160

Map the tuple to its value value and sum it up with reduce.

func getSum(myList: [(title: String, id: Int, value: Double)]) -> Double {
    return myList.map(\.value).reduce(0.0, +)
}

Upvotes: 4

Related Questions