Swift syntax error in adding element to Array

Question

There are syntax error in it. New to Swift :(

var inputString: String = "Hello its question? </question> Oky its the answer"

let splitter: String = "</question>"
var splittedArray = [inputString .componentsSeparatedByString(splitter)]


var questionIndex = 0
var answerIndex = 0
var mQuestions = []
var mAnswers = []


for var index = 0; index < splittedArray.count; ++index {
if index % 2 == 0{
    // Question comes first
    splittedArray.append(mQuestions[questionIndex])
    questionIndex++
}else{
    // Answer comes second

 splittedArray.append(mAnswers[answerIndex])
    answerIndex++
   }
}

Error is:

An Object is not convertable to String,

at this line of code.

splittedArray.append(mQuestions[questionIndex])

An Object or AnyObject?

Ratikanta Patra
– Ratikanta Patra

2014-12-05 06:39:33 +00:00
Commented Dec 5, 2014 at 6:39 — Ratikanta Patra
– Ratikanta Patra, Commented Dec 5, 2014 at 6:39

Todd Agulnick · Accepted Answer · 2014-12-05 07:27:33Z

2

There are indeed syntax errors, but that's not all:

You can't inline Objective-C code as you're doing with [inputString.components...]
You can't initialize an empty array without specifying its type
You've got the object and the parameter reversed in your appends

Here's a quick rewrite addressing the above:

import Foundation

var inputString = "Hello its question? </question> Oky its the answer"

let splitter = "</question>"
var splittedArray = inputString.componentsSeparatedByString(splitter) as [String]

var mQuestions = [String]()
var mAnswers = [String]()

while splittedArray.count >= 2 {
    mQuestions.append(splittedArray.removeAtIndex(0))
    mAnswers.append(splittedArray.removeAtIndex(0))
}

edited Dec 5, 2014 at 7:27

answered Dec 5, 2014 at 6:50

Todd Agulnick

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Comments

jrturton · Accepted Answer · 2014-12-05 06:50:19Z

0

var splittedArray = [inputString .componentsSeparatedByString(splitter)]

Bit of an objective-c hangover here. With those square brackets, you're making this an array with an array inside it. That's going to make splittedArray have the wrong type, and the wrong contents.

Once this program compiles it will also crash, because you're then appending to splittedArray from an empty mQuestions array, using an out of bounds index.

answered Dec 5, 2014 at 6:50

jrturton

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