ios - Like objective-C , how to write "valueForKey" in swift?

Question

NSDictionary dic;
NSMutableArray array;
//Objective-C Code.
array = [dic valueForKey:@"Table"];  //"Table" is key in dictionary

How to write same code in Swift?

Answer 1

There is no more valueForKey: in Swift, but there is a way to use map to achieve a similar, if not same, result.

If the objects in the collection are dictionaries:

let array = dic.map { $0["table"] as? String }

If the objects in the collection are objects:

let array = dic.map{ $0.table }

If you are using Objective-C collection types like NSDictionary in your example, then like others have said, you can still continue to use valueForKey:.

let array = dic.valueForKey("table")