Create an array object from string array

Question

I have an array of string which has x amount of elements and x >= 2

let arrayOfString = ["A", "B"]
// or
let arrayOfString = ["A", "B", "C", ...]

and I want to use the arrayOfString to create an object array in this format

[
    {
        "option": "A"
    },
    {
        "option": "B"
    },
    ...
]

I have tried to create a struct like this

    struct PollOptionArray {
    let option: String
}

and loop through the string array

var pollDetailArray = [PollOptionArray]()

      for index in arrayOfString {
             pollDetailArray.append(PollOptionArray(option: index)
       }

but I think it is wrong Can anyone give me a suggestion? Thank you

rmaddy · Accepted Answer · 2018-09-22 03:12:17Z

2

A simple map will work:

let objectArray = arrayOfString.map { [ "option" : $0 ] }

Or, based on your struct:

let pollDetailArray = arrayOfString.map { PollOptionArray(option: $0) }

edited Sep 22, 2018 at 3:12

answered Sep 22, 2018 at 3:03

rmaddy

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4 Comments

Nancy P Over a year ago

What do you think about my method?

rmaddy Over a year ago

I just updated based on your struct (which wasn't in the question when I first answered). Your code works just fine if you want to create an array of struct. The map in my answer gives the same result.

Nancy P Over a year ago

Oh cool. Lastly, is there a way that I can ignore empty string because in my string array, sometimes it is ["A", "", "B"] and I want to ignore that empty string. Thanks!

rmaddy Over a year ago

Filter the array: let pollDetailArray = arrayOfString.filter { !$0.isEmpty }.map { PollOptionArray(option: $0) }

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