DateHelper playground

DateHelperPlaygound.playground

//: Playground - noun: a place where people can play

import UIKit

var str = "Hello, Date Helper playrgound!"

//Returns the first date of the current year. Should return the following timestamp for the year 2016: 1451606400
func getFirstDateOfCurrentYear() -> NSNumber {
    
    //Get current year
    let currentDate = NSDate()
    let calendar = NSCalendar.currentCalendar()
    calendar.timeZone = NSTimeZone(abbreviation: "UTC")!
    let components = calendar.components([.Day , .Month , .Year], fromDate: currentDate)
    components.day = 1
    components.month = 1
    
    // Get NSDate given the above date components
    let date = calendar.dateFromComponents(components)
    let dateTimeInterval = (date?.timeIntervalSince1970)!
    return Int(dateTimeInterval)
//    return 1451606400
}

//Returns the last date of the year 2040. Should return the following timestamp: 2240524800
func getLastDateAvailable() -> NSNumber {
    
    let calendar = NSCalendar.currentCalendar()
    calendar.timeZone = NSTimeZone(abbreviation: "UTC")!
    
    let c = NSDateComponents()
    c.year = 2040
    c.month = 12
    c.day = 31
    
    // Get NSDate given the above date components
    let date = calendar.dateFromComponents(c)
    let dateTimeInterval = (date?.timeIntervalSince1970)!
    return Int(dateTimeInterval)
            
//    return 2240524800
    
}

print("Timezone: \(NSTimeZone.systemTimeZone())")
print("Timezone: \(NSTimeZone.localTimeZone())")
print("Timezone: \(NSTimeZone(abbreviation: "UTC")!)")
print("getFirstDateOfCurrentYear")
print("->: \(1451606400)")
print("=>: \(getFirstDateOfCurrentYear())")

print("getLastDateAvailable")
print("->: \(2240524800)")
print("=>: \(getLastDateAvailable())")