Question

How to shift elements of an array to the left by one position in Swift

Answer 1

import Foundation

func shiftLeft(_ arr: [Int]) -> [Int] {
    guard !arr.isEmpty else { return arr }
    
    var result = Array(arr[1...])
    result.append(arr[0])
    
    return result
}

let arr = [0, 1, 2, 3, 4, 5]
print("Original: \(arr)")

let shifted = shiftLeft(arr)
print("Shifted:  \(shifted)")



/*
run:

Original: [0, 1, 2, 3, 4, 5]
Shifted:  [1, 2, 3, 4, 5, 0]

*/

 

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