Adding values to 2D Array String value Swift2

Question

Below I have a constant dict that is of NSMutableArray type that stores my data extracted from JSON. I've tested that I'm able to extract what I need when referring to variable name.

While I know that appending a normal array would be myArrayValue.append("String"), however I tried the same method with my 2D array it doesn't work.

I'm quite new to Swift2 programming, please do explain in detail. Thanks in advance!

let dict: NSMutableArray!=(try! NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers)) as! NSMutableArray

var arrayObject : [AnyObject]
var arrayName : [[String]] = [[]]
var name : String

for var x=0; x<dict.count; x++ {
        arrayObject = dict[x].allValues
    for var y=0; y<5; y++ {
        name = arrayObject[y].description as String
        arrayName[x][y].append(name)
    }
}

Eric Aya · Accepted Answer · 2016-01-07 23:19:47Z

2

I won't fix your code myself, there's too much work, I'm just telling you what is needed:

You don't want to use Foundation's objects anymore if you don't actually need them, use Swift arrays.
Don't call "dict" something that is an array.
Don't force unwrap your values... use safe unwrapping with techniques like if let.
Don't force with try!, use Do-Catch and Try instead, and handle errors.
Don't use MutableContainers if you don't need this feature. Use an empty array instead for passing no options.
Don't wrap in parenthesis things that don't need to be wrapped in parenthesis.
Don't use manually indexed loops when you can use Swift paradigms like for item in array { print(item) }.
arrayName[x][y] can't work if arrayName[x] is nil.

Once you've done these fixes and improvements, your current problem will disappear because your code will be easier to follow and maintain.

edited Jan 7, 2016 at 23:19

answered Oct 29, 2015 at 11:16

Eric Aya

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2 Comments

Joe Leong Over a year ago

Thanks for the reply! I'm very new to Swift, and will try my best to interpret what you meant.

Eric Aya Over a year ago

You're welcome. That's a very good idea to try and improve your knowledge by yourself, best way to learn! On the other hand, don't hesitate to ask new questions if you're stuck somewhere - we'll be glad to help.

katleta3000 · Accepted Answer · 2015-10-29 11:32:15Z

0

Your post is hard reading, you didn't explain well your problem and I suppose it should be downvoted. Update your issue, if my answer is not correct, hope, it helps:

let JSONDict: [[String: AnyObject]] = [["name" : "value1"], ["name" : "value2"]];
var arrayName = [String]()
for dict in JSONDict {
    if let value = dict["name"] as? String {
       arrayName.append(value)
    }
}

answered Oct 29, 2015 at 11:32

katleta3000

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1 Comment

Joe Leong Over a year ago

Sorry that my post is hard to read. Basically, I just need to store Strings into my 2 dimensional array. arrayName[0][0] = "String Value" fails to execute. Side track, because I have a data of 3000+ rows by 7 columns, with increasing rows over time due to more data. Would 2 dimensional array be the way to manage my data?

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