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22,588 PointsData Type for Casting JSON Object
In the video, your line
let json = try JSONSerialization.jsonObject(with: data, options: []) as? [String: AnyObject]
Couldn't this also utilize the typealias you created a couple lines before the jsonTask function?
typealias JSON = [String: AnyObject]
So, your final code could simply be shorter and more readable
let json = try JSONSerialization.jsonObject(with: data, options: []) as? JSON