Swift Array Programming Exercises: Create a new array with double the lenght of a given array of integers and its last element is the same as the given array

Last update on December 21 2024 10:28:34 (UTC/GMT +8 hours)

Write a Swift program to create a new array with double the lenght of a given array of integers and its last element is the same as the given array. The given array will be length 1 or more. By default, a new integer array contains all 0's.

Pictorial Presentation:

Sample Solution:

Swift Code:

func new_array(_ a: [Int]) -> [Int] {
    var new_array: [Int] = [a.last!]
    
    for _ in a {
        new_array.insert(0, at: new_array.startIndex)
        new_array.insert(0, at: new_array.startIndex)
    }
    new_array.remove(at: 0)
    
    return new_array
}

print(new_array([1, 2, 3, 4]))
print(new_array([1, 2, 3]))
print(new_array([1]))

Sample Output:

[0, 0, 0, 0, 0, 0, 0, 4]
[0, 0, 0, 0, 0, 3]
[0, 1]

Swift Programming Code Editor:

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