Array Filtering #swift #array #filter

ArrayFiltering.swift

// Filter array to only the drinks in the last 24 hours.
private func filterDrinks(drinks: [Drink]) -> [Drink] {
    // The current date and time.
    let endDate = Date()
    
    // The date and time 24 hours ago.
    let startDate = endDate.addingTimeInterval(-24.0 * 60.0 * 60.0)
    
    // return an array of drinks with a date parameter between
    // the start and end dates.
    return drinks.filter { (drink) -> Bool in
        (startDate.compare(drink.date) != .orderedDescending) &&
            (endDate.compare(drink.date) != .orderedAscending)
    }
}

func removeRows(at offsets: IndexSet) {
    numbers.remove(atOffsets: offsets)
} 

// Iterate and indexset
indexSet.forEach { islands.remove(at: $0) }

// Filter and Map
private func delete(indexSet: IndexSet) {
        let drinkEntries = indexSet
            .filter {dm.lastNDrinks[$0].sample != nil }
            .map { dm.lastNDrinks[$0].sample! }
        
        dm.deleteSample(samples: drinkEntries) {_,_ in }
}