Array Manipulation and reordering in Swift

Question

Given an array (for example, [ 1, 0, 2, 0, 0, 3, 4 ]), implement methods that moves the non-zero elements to the beginning of the array (the rest of the elements don't matter)

I have implemented as follows, it works but I wonder shorter way of doing it?

import Foundation

var inputArray = [ 1, 0, 2, 0, 0, 3, 4 ]

func remoZeros (inputArray :[Int]) -> [Int]
{
  var nonZeroArray = [Int]()
  var zeroArray = [Int]()

  for item in inputArray
  {
    if item != 0
    {
      nonZeroArray.append(item)
    }
    else
    {
      zeroArray.append(item)
    }
  }

return nonZeroArray + zeroArray

}

var result = remoZeros (inputArray: inputArray)

pay attention to the fact that the problem does not specify order, only that non-zero should be first — Paul Degnan
– Paul Degnan, Commented Oct 18, 2018 at 21:11
@PaulDegnan, could u please illustrate your approach with an example? — casillas
– casillas, Commented Oct 18, 2018 at 21:12
This is a code review. You should post this at codereview.stackexchange.com and then delete it from here. — rmaddy
– rmaddy, Commented Oct 18, 2018 at 21:15
If the relative order of the elements doesn't matter, then you want partition(by:). — Hamish
– Hamish, Commented Oct 18, 2018 at 21:33
inputArray.partition(by: { $0 == 0 }) – note that this mutates the original array in-place rather than returning a new one. — Hamish
– Hamish, Commented Oct 18, 2018 at 21:38

Shehata Gamal · Accepted Answer · 2018-10-18 21:17:19Z

2

You can try

var inputArray = [ 1, 0, 2, 0, 0, 3, 4 ]

func remoZeros (inputArray :[Int]) -> [Int] {

   return inputArray.filter{$0 != 0} + inputArray.filter{$0 == 0}
}

answered Oct 18, 2018 at 21:17

Shehata Gamal

101k8 gold badges75 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Array Manipulation and reordering in Swift

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related