Divide an array of objects into sections and count?

Question

Swift

Hi all!
There is a ProviderClass class, about 200 objects.

Please tell me how to calculate the number of lines in each section by the "grp" parameter. It’s impossible to count the number of lines in any way, the number of sections seems to have been calculated:

func numberOfSections(in tableView: UITableView) -> Int {
        return Set(providers.map{$0.grp}).count
 }

Thank you!

Answer 1

From your object, make some structures:

struct Element {
    let id: String
    let title: String
    let isVisible: Bool
}
struct Group {
    let id: String
    let elements: [Element]
}
struct Provider {
    let groups: [Group]
}