SearchUtil

SearchUtil.swift

class SearchUtil{
    var list: [Int] = []
    
    init(list: [Int]) {
        self.list = list
    }
    
    func searchItem(element: Int, foundItem: (Int?)->()) {
        let itemFoundList = self.list.filter { item in
            item == element
        }
        if (itemFoundList.isEmpty){
            foundItem(nil)
        }
        else{
            foundItem(itemFoundList.first)
        }
    }
}

let searchUtil = SearchUtil(list: [Int](arrayLiteral: 24,25,26))
searchUtil.searchItem(element: 23) {(result) -> () in
    print(result ?? "Not found")
}