swift iterating webfolder for putting filenames in a array - arrays

Question

I want to put the filenames of a web folder "mywwwaddress" into an array
but the println gives me an empty array: []
func files(){
var urls : [NSURL] = []
let dirUrl = NSURL(string: "mywwwadres")
let fileManager = NSFileManager.defaultManager()
let enumerator:NSDirectoryEnumerator? = fileManager.enumeratorAtURL(dirUrl!, includingPropertiesForKeys: nil, options: nil, errorHandler: nil)
while let url = enumerator?.nextObject() as! NSURL? {
urls.append(url)
}
println(urls)
}

Answer 1

When I try your code with a URL of a directory on my local file system, it works OK for me, so you may want to put more error handling in to see if there's a problem reaching the URL you're using.
Also, since NSEnumerator conforms to SequenceType, you can use for...in or other sequence-processing operations like map on it instead, which can simplify the code a little.
Here's a version with more error handling to try:
func files() {
let fileManager = NSFileManager.defaultManager()
let url = NSURL(string: "mywwwadres")
assert(url != nil, "Invalid URL")
let enumerator = url.flatMap { fileManager.enumeratorAtURL($0,
includingPropertiesForKeys: nil,
options: nil)
{ url, error in
println("error with url \(url): \(error)")
return true // true to keep going
}
}
assert(enumerator != nil, "Failed to create enumerator")
let urls = enumerator.map { enumerator in
map(enumerator) { url in
url as! NSURL
}
}
println(urls ?? [])
}