Get only the string value from NSArray output

Question

I am storing values from Json response like

self.NameArray = self.attachmentsArray.valueForKey("filename") as! NSArray

Output:

NameArray(("Din.pdf","img.jpeg"),(),(),("41_58"))

I got this output. I need to get the array only having ("Din.pdf","img.jpeg","41_58").

How to get it using swift code?

No its doesn't, flatmap gives different result than what user wants, OP wants to emit empty arrays too. Kindly open it and I'll give the answer. — Bista, Sep 14 '16 at 11:18
@Mr.UB Actually now that OP has told us they have an NSArray, the linked answers would not be sufficient since OP would have to cast their NSArray to a Swift array first ([screenshot](https://www.evernote.com/l/AOx037lpi1JMsKqQjCVBj3x3YTQuQ7FQQEc)). — Eric Aya, Sep 14 '16 at 11:31
Yes, OP'll need to convert the `NSArray` into `[[String]]` Type. http://imgur.com/sTgRy7W — Bista, Sep 14 '16 at 11:33
@Mr.UB Re-opened. In your answer, please also give a link to http://stackoverflow.com/questions/24465281/flatten-a-array-of-arrays-in-swift it will be useful for readers anyway. Thanks. — Eric Aya, Sep 14 '16 at 11:35
I'd use `flat` (to get only "1" level), and `filter` to keep only the strings not empty. — Larme, Sep 14 '16 at 11:39

score 1 · Accepted Answer · edited May 23 '17 at 12:08

Convert NSArray to Swift Type [[String]]:

let NameArray:NSArray = [["Din.pdf","img.jpeg"], [], [], [ "41_58" ]]

let swiftArray = NameArray as! [[String]]

let flattenedArray = swiftArray.flatMap{ $0 }

Credits: Eric Aya and Flatten a Array of Arrays in Swift

If you do not want to convert it into Swift Type:

let NameArray:NSArray = [["Din.pdf","img.jpeg"], [], [], [ "41_58" ]]

let arrFiltered:NSMutableArray! = []

for arr in NameArray {
    for a in arr as! NSArray {
        arrFiltered.addObject(a)
    }
}

print(arrFiltered)

Get only the string value from NSArray output

1 Answers1