Answer by ChatGPT
In Swift, you cannot use continue statement inside the map function because map function traverses each element of an array and executes a closure for each element, and continue statement can only be used inside a loop. However, there is a way to skip a specific element and continue to the next iteration inside the map function. You can achieve this by using a conditional statement inside the closure to skip the element. For example, if you want to skip odd numbers and process only even numbers in an array, you can write the following code:
let numbers = [1, 2, 3, 4, 5, 6]
let evenNumbers = numbers.map { number in
if number % 2 != 0 {
return nil // skip the element by returning nil
}
return number * 2 // process even numbers by returning a value
}.compactMap { $0 } // remove nil values
print(evenNumbers) // [4, 8, 12]
In the code above, we return nil to skip odd numbers and return a value to process even numbers inside the map function. Then, we use the compactMap function to remove nil values and print the result.
Therefore, although you cannot use continue statement inside the map function, you can skip a specific element and continue to the next iteration by using a conditional statement inside the closure.
If you gets error “Generic parameter ‘ElementOfResult’ could not be inferred”, add return type to the map closure
from
let monthlyDividendViewModels = dividendResponse.monthlyDividends
.map { monthlySummary in
guard let month = monthlySummary.paymentMonth else {
return nil
}
return MonthlyDividendViewModel(sum: sum, stockDividends: stockDividends)
}
.compactMap { $0 }
to
let monthlyDividendViewModels = dividendResponse.monthlyDividends
.map { monthlySummary -> MonthlyDividendViewModel? in
guard let month = monthlySummary.paymentMonth else {
return nil
}
return MonthlyDividendViewModel(sum: sum, stockDividends: stockDividends)
}
.compactMap { $0 }
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