Question

How to convert an integer array to a string array in Swift

Answer 1

/**
 * Converts an array of integers into an array of strings idiomatically.
 *
 * - Parameter intArray: The input array of integers (`[Int]`).
 * - Returns: A new array containing the string representation of each integer (`[String]`).
 */
func convertIntArrayToStringArray(_ intArray: [Int]) -> [String] {
    // .map transforms each element in the collection.
    // String.init (or shorthand { String($0) }) creates a String from each Int.
    return intArray.map(String.init)
}
 
// --- Usage Example ---
let numbers: [Int] = [100, 200, 300, 400, 500]
 
// Call the conversion function
let strings: [String] = convertIntArrayToStringArray(numbers)
 
// Print each element
for str in strings {
    print(str) 
}
 
 
/*
run:
 
100
200
300
400
500
 
*/

 

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Answer 2

func convertIntArrayToStringArray(_ intArray: [Int]) -> [String] {
    // $0 represents the current integer element in the iteration
    return intArray.map { String($0) }
}
 
// --- Usage Example ---
let numbers: [Int] = [100, 200, 300, 400, 500]
 
// Call the conversion function
let strings: [String] = convertIntArrayToStringArray(numbers)
 
// Print each element
for str in strings {
    print(str) 
}
 
 
/*
run:
 
100
200
300
400
500
 
*/

 

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