Using guard

guard.swift

func getCount() -> Int {
    guard let json = self.json else { return 0 }
    return json.count
}
    
func getAll() -> [Clip] {
    guard json != nil else { return [] }
    var clips:[Clip] = []
    for result in json! {
        guard let id = result["id"] as? Int,
            name = result["name"] as? String,
            url = result["url"] as? String else {continue}
        clips.append(Clip(id: id, name: name, url: url))
    }
    return clips
}