CODEWITHSUNDEEP
arraysswift
user9079075
user9079075

Reputation:

Swift 4: Filtering Array

i am new to swift, currently practicing

here i have a plist file, which has an Array Of Dictionaries, each dictionary has one string, the plist has 3 records, it looks like this

item 0:
kurdi: Googlee

item 1:
kurdi: Yahooe

item 2:
kurdi: Binge

here's a image for the plist; Screenshot 11:52AM

okay so the point is, when a user searches for oo for example two of the records contain oo, such as google and yahoo, i want to return an array of results,

for that case i used:

let path = Bundle.main.path(forResource:"hello", ofType: "plist")
let plistData = NSArray(contentsOfFile: path!)
let objCArray = NSMutableArray(array: plistData!)

 if let swiftArray = objCArray as NSArray as? [String] {

     let matchingTerms = swiftArray.filter({
      $0.range(of: "oo", options: .caseInsensitive) != nil // here
        })
        print(matchingTerms)

    }

but unfortunately, when i print matchingTerms it returns nil .. thanks

Upvotes: 0

Views: 2291

Answers (2)

vadian
vadian

Reputation: 285250

If you are new to Swift please learn first not to use NSMutable... Foundation collection types in Swift at all. (The type dance NSArray -> NSMutableArray -> NSArray -> Array is awful). Use Swift native types. And instead of NSArray(contentsOfFile use PropertyListSerialization and the URL related API of Bundle.

All exclamation marks are intended as the file is required to exist in the bundle and the structure is well-known.

let url = Bundle.main.url(forResource:"hello", withExtension: "plist")!
let plistData = try! Data(contentsOf: url)
let swiftArray = try! PropertyListSerialization.propertyList(from: plistData, format: nil) as! [[String:String]]
let matchingTerms = swiftArray.filter({ $0["kurdi"]!.range(of: "oo", options: .caseInsensitive) != nil })
print(matchingTerms)

Upvotes: 2

Bilal
Bilal

Reputation: 19156

Cast swift array to [[String:Any]] not [String]. And in filter you need to check the value of the key kurdi. Try this.

if let swiftArray = objCArray as? [[String:Any]] {
    let matchingTerms = swiftArray.filter { (($0["kurdi"] as? String) ?? "").range(of: "oo", options: .caseInsensitive) != nil }
    print(matchingTerms)
}

Upvotes: 0

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