Browse questions answered by Jon Skeet

Field and Property pair shortening in C#

I have a couple of these properties scattered about my code: private Animator _anim; public Animator anim { get { if (_anim == null) { _anim...

Basically, no - there's nothing to let you use automatically implemented properties with "just a bit" of custom code. You could shorten your code, though to: public Animator Animator { get { return _anim ?? (_anim =... more 8/23/2015 7:07:25 PM

How to find amount of hours in a day in NodaTime?

I'm writing a test app to reproduce some data writing scenario - a task that runs each hour. For that purpose I need to know how many times it will execute - how many hours there...

Between two local date/time values, there will always be 24 hours. It sounds like you're interested in a date in a particular zone, in which case you want: var startOfDay = zone.AtStartOfDay(date); var startOfNextDay =... more 8/22/2015 8:29:41 AM

How do I get the list of strings in tzdb used as time zone initializer?

SO I am new to NodaTime and trying to use it to for storing timezone information using DateTimeZone object. I came across below sample in user guide etc. which give me a nice...

To fetch the time zone IDs programmatically, use the Ids property in IDateTimeZoneProvider. For example, to find all zones: var provider = DateTimeZoneProviders.Tzdb; foreach (var id in provider.Ids) { var zone = provider[id]; //... more 8/22/2015 8:23:23 AM

C# Get Integer Byte Array in String

I have a random integer value which I need to represent in String as a Byte array. For example: int value = 32; String strValue =...

Don't take this approach at all. You should be writing to a binary stream of some description - and write the binary data for the length of the packet/message, followed by the message itself. For example: BinaryWriter writer = new... more 8/19/2015 6:48:16 PM

Why is the base type of an open generic type not open?

Consider a piece of the code below: public class A<T> { } public class B<T> : A<T> { } In such case: var a =...

So it is closed using a non-existing type of name "T" and only doing GetGenericTypeArgument on it makes it open again. Why is that? Because there is one type argument provided - the type parameter to B. Look at how you're specifying... more 8/19/2015 9:27:15 AM

asp.net get date from yyMMdd

I have this small code here: @foreach (var date in ViewBag.MissingDays) { var isoDate = date.ToString("yyMMdd"); <div class="col-md-1"> <input...

You probably want to keep the value part as it is - or ideally as yyyyMMdd, as two-digit year formats are horrible - and just format the display part differently. I don't think there's anything to use two-letter month abbreviations - the... more 8/18/2015 8:29:51 AM

in case of TreeMap , if pass our own class object as key then which interface is needed to be implemented Comparable or Comparator and why?

In case of "TreeMap" , if pass our own class object as key then which interface is needed to be implemented Comparable or Comparator and why?

If you construct the TreeMap specifying a comparator, then that will be used to compare the keys. If you construct the TreeMap without specifying a comparator, then the keys must implement Comparable. Typically the key would implement... more 8/15/2015 12:02:34 PM

Similar Extension methods are there any differences?

What are the differences between these two extension methods? public static class Test { public static int First<T>(this T obj) { return 2; } ...

There are a few differences, yes. The first one won't box value types - but will end up JIT-compiling the method multiple times for different type arguments (once for all reference types, and once per value type). So: byte x1 = 10; int... more 8/15/2015 10:28:13 AM

Access to modified closure: ReSharper

I created a library that handles database access. I recently added transaction handling; however, I came across a small issue. To outline this, I wrote this sample for...

I would suggest avoid using a ref parameter for this in the first place - it seems needlessly complicated to me. I'd rewrite DoAction as: static string DoAction(string data, Action<string> action) { data = data == null ?... more 8/15/2015 10:20:07 AM

Does 'await Task.Delay(1000)' block ANY thread?

I've read that Task.Delay() is advised to be awaited not to block the calling thread (as oposed to Task.Delay().Wait() and Thread.Sleep()). But as I learned more about async/await...

however it blocks SOME thread, where the awaited task gets shifted to? It depends on what you mean by "block". It doesn't cause any thread to go to sleep for 1 second, or (worse) spin wait for the delay to complete. Instead, it... more 8/15/2015 10:15:40 AM