How to add value from Dictionary having value as dictionary in Swift?-CodePudding

I am having dictionary whose value is another dictionary

for ex. ["1": ["1623699578": 1.08], "2": ["1216047930": 6.81]]

inner dictionary will have only one value

i want to do sum of 1.08 and 6.81

for now i am tried to just iterate dictionary and taking value using dict.values.first and adding. But i not sure if its best way

is there any best way to do this?

CodePudding user response：

This will sum all the dictionary value's values. We use reduce to combine the dictionary collections into a single value.

Code:

let dict = ["1": ["1623699578": 1.08], "2": ["1216047930": 6.81]]

let sum: Double = dict.reduce(into: 0) { partialResult, pair in
    partialResult  = pair.value.values.reduce(0,  )
}

print(sum)

This will also sum the inner-dictionary values.

CodePudding user response：

Another notation for what @George proposed can be:

let sum = dict.values.compactMap { $0.values.first }.reduce(0.0) { $0   $1 }