Question

How to get an array subset in Swift

Answer 1

func getSubset(array: [Int], startIndex: Int, length: Int) -> [Int] {
    // Extract a subset of the array
    let endIndex = startIndex + length
    return Array(array[startIndex..<endIndex])
}

let arr = [3, 7, 9, 0, 4, 2, 1, 8] 
let startIndex = 2 // Start index for the subset
let length = 4     // Number of elements in the subset

let subset = getSubset(array: arr, startIndex: startIndex, length: length)

print("Subset: \(subset.map { String($0) }.joined(separator: ", "))")

 
 
/*
run:

Subset: 9, 0, 4, 2
 
*/

 

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