Fatal error - Assign value to array in for loop

Question

I have a simple TwitterTweet struct:

struct TwitterTweet {
    let userName: String
    let userDescription: String
    let userFollowersCount: Int
    let userProfileImage: String
    let tweetText: String
    let tweetRetweetCount: Int
    let tweetFavouriteCount: Int
}

and an array of the TwitterTweet struct:

//var twitterTweets: [TwitterTweet]?
var twitterTweets = [TwitterTweet]()

I retrieve and parse JSON data into an array of NSDictionary. In the for-loop, I create a new TwitterTweet, but when I try and add it to the array at index i, i get the error:

fatal error: Array index out of range

if let data = NSJSONSerialization.JSONObjectWithData(responseData, options: nil, error: &err) as? [NSDictionary] {
    if data.count != 0 {
        for var i = 0; i < data.count; i++ {
            if let
            tt = data[i]["text"] as? String,
            rc = data[i]["retweet_count"] as? Int,
            tc = data[i]["favorite_count"] as? Int {
                if let ud = data[i]["user"] as? NSDictionary {
                    if let
                    un = ud["name"] as? String,
                    dc = ud["description"] as? String,
                    fc = ud["followers_count"] as? Int,
                    pi = ud["profile_image_url"] as? String {

                        let tweet = TwitterTweet(userName: un, userDescription: dc, userFollowersCount: fc, userProfileImage: pi, tweetText: tt, tweetRetweetCount: rc, tweetFavoriteCount: tc

                        self.twitterTweets[i] = tweet                              
                    }
                }
            }
        }
    }
    else {
        println("no data")
        println("error: \(error)")
    }

I am not sure how to assign the array with size of data.count. I have tried adding the following code before the for-loop

twitterTweets = [TwitterTweet](count: data.count, repeatedValue: nil)

But this does not work for me. Any help or suggestions are greatly appreciated, as I have already spent hours trying to figure out a solution. Thanks.

buildsucceeded · Accepted Answer · 2015-05-20 15:17:33Z

2

twitterTweets += [tweet]

or

twitterTweets.append(tweet)

or

twitterTweets.splice([tweet], atIndex: i)

answered May 20, 2015 at 15:17

buildsucceeded

4,2214 gold badges36 silver badges73 bronze badges

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

1 Comment

buildsucceeded Over a year ago

No problem! Sometimes just writing out the question helps… sometimes you have to wait for someone to answer :)

Collectives™ on Stack Overflow

Fatal error - Assign value to array in for loop

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related