(Swift 3,4,5...) Swap JSON Objects

Demonstrates how to swap two JSON objects within a JSON document.

Note: This example requires Chilkat v9.5.0.76 or greater.

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func chilkatTest() {
    let json = CkoJsonObject()!
    json.emitCompact = false

    // Load the following JSON:

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Sara": {
    //     "DOB": "13/05/1982",
    //     "gender": "female",
    //     "country": "FR"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   }
    // }

    var success: Bool = json.loadFile("qa_data/json/people.json")
    // Assume success..

    // Swap the positions of Jon and Sara.
    var index1: Int = json.index(of: "Jon").intValue
    var index2: Int = json.index(of: "Sara").intValue
    json.swap(index1, index2: index2)

    // We have this now:
    print("\(json.emit()!)")

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   },
    //   "Sara": {
    //     "DOB": "13/05/1982",
    //     "gender": "female",
    //     "country": "FR"
    //   }
    // }

    // To swap an inner member:
    var jsonSara: CkoJsonObject? = json.object(of: "Sara")
    index1 = jsonSara!.index(of: "DOB").intValue
    index2 = jsonSara!.index(of: "country").intValue
    jsonSara!.swap(index1, index2: index2)
    jsonSara = nil

    // We now have this:
    print("\(json.emit()!)")

    // {
    //   "petter": {
    //     "DOB": "26/02/1986",
    //     "gender": "male",
    //     "country": "US"
    //   },
    //   "Jon": {
    //     "DOB": "19/03/1984",
    //     "gender": "male",
    //     "country": "UK"
    //   },
    //   "Sara": {
    //     "country": "FR",
    //     "gender": "female",
    //     "DOB": "13/05/1982"
    //   }
    // }

}