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What is the most effective way of tracking time/dates in an iOS/Swift application?


What is the most effective way of tracking time/dates in an iOS/Swift application?

By : Phoenix Boyd
Date : November 19 2020, 03:01 PM
it fixes the issue A regular timer will not run in the background.
You would want to either be using a backend service to send push notifications, or scheduling local notifications using UNUserNotificationCenter by creating a UNNotificationRequest.
code :


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Frameworks to manage dates (effective date and expiry dates)

Frameworks to manage dates (effective date and expiry dates)


By : user1893618
Date : March 29 2020, 07:55 AM
around this issue I don't know of any framework that will handle this for you. If you build it yourself, I suggest you just store a list of prices and start dates for each product. So, for your example above, I'd store:
code :
price start_date
400   2007-01-01
200   2009-01,01
LINQ - How to query a range of effective dates that only has start dates

LINQ - How to query a range of effective dates that only has start dates


By : user1923571
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I'm using C# 3.5 and EntityFramework. I have a list of items in the database that contain interest rates. Unfortunately this list only contains the Effective Start Date. I need to query this list for all items within a range. , I haven't tried this on EF but on Linq to objects it works fine:
code :
var result = source
  .OrderBy(x => x.start)
  .GroupBy(x => x.start < startDate)
  .SelectMany((x, i) => i == 0 ? new[] {new { value = x.Last().value, start = x.Last().start }} : x.Where(y => y.start < endDate));
What is the most effective way to manage time zones in a PHP/MySQL application?

What is the most effective way to manage time zones in a PHP/MySQL application?


By : Antonio Sánchez
Date : March 29 2020, 07:55 AM
help you fix your problem I'd propose another solution:
Store all the dates in mysql timestamp column type Right after connect to mysql - specify current user's timezone with SET time_zone='' where can be either +01:00 offset or timezone name Asia/Vladivostok (for the latter special timezones db should be imported by DBA)
Swift - function wise time consumption tracking

Swift - function wise time consumption tracking


By : Vey
Date : March 29 2020, 07:55 AM
With these it helps These features are available in Xcode as a separate app called "Instruments":
https://developer.apple.com/library/ios/documentation/DeveloperTools/Conceptual/InstrumentsUserGuide/
Tracking Elapsed Time with Swift

Tracking Elapsed Time with Swift


By : ajurado
Date : March 29 2020, 07:55 AM
it fixes the issue You have several options available to you for persisting a number like that - the absolute easiest and quickest is probably just to use UserDefaults to store/retrieve the number. That is not exactly the intended use for UserDefaults, but if you're just storing one TimeInterval it's not going to cause you any problems.
A bare bones implementation would look like this:
code :
 let interval: TimeInterval = 20 //replace with the time from your countdown timer
 UserDefaults.standard.set(interval, forKey: "totalTimeElapsed")
 let newTimeElapsed: TimeInterval = 20 //replace with time from countdown timer
 let totalSoFar = UserDefaults.standard.double(forKey: "totalTimeElapsed") //will be 0 if it doesn't exist
 UserDefaults.standard.set(newTimeElapsed + totalSoFar, forKey: "totalTimeElapsed")
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