CODEWITHSUNDEEP
arraysswift
KevM
KevM

Reputation: 2506

Simple way to convert an array of non-optionals to an array of optionals

I wish to assign an array [T] to an optional array [T?]. This seems like it should be straightforward but the only solution I came up with is to do it manually. 

struct ArrayHelper<T> {
 func toArrayOfOptionals(input: [T]) -> [T?] {
  var result = [T?]()
  for value in input {
      result.append(value)
  }
  return result
 }
}

Upvotes: 2

Views: 153

Answers (1)

Matthew Seaman
Matthew Seaman

Reputation: 8092

I don't think there are any built-in ways to do this seamlessly, but map ought to be a simpler solution:

var input = [T]()
let output = input.map { Optional($0) }

Edit: Code modified based on suggestions in comments.

Upvotes: 5

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