I admit it, I’ve struggled with pattern matching. In the next few blog posts I’ll explore this magic, starting today with switch expressions (not to be confused with switch statements).
The type of switch we’re familiar with is the switch statement:
namespace switchStatement;
internal class Program
{
static void Main(string[] args)
{
string day = string.Empty;
day = GetDay(2);
Console.WriteLine(day);
}
public static string GetDay(int dayNum)
{
string dayName;
switch (dayNum)
{
case 0:
dayName = "Sunday";
break;
case 1:
dayName = "Monday";
break;
case 2:
dayName = "Tuesday";
break;
case 3:
dayName = "Wednesday";
break;
case 4:
dayName = "Thursday";
break;
case 5:
dayName = "Friday";
break;
case 6:
dayName = "Saturday";
break;
default:
dayName = "Invalid day number";
break;
}
return dayName;
}
}This will return Tuesday.
A switch expression has a slightly different syntax, but more important, it matches on a pattern. I’m going to use the example from Microsoft Learning (https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/operators/switch-expression) and take it apart
public static class SwitchExample
{
public enum Direction
{
Up,
Down,
Right,
Left
}
public enum Orientation
{
North,
South,
East,
West
}
public static Orientation ToOrientation(Direction direction) => direction switch
{
Direction.Up => Orientation.North,
Direction.Right => Orientation.East,
Direction.Down => Orientation.South,
Direction.Left => Orientation.West,
_ => throw new ArgumentOutOfRangeException(nameof(direction), $"Not expected direction value: {direction}"),
};
public static void Main()
{
var direction = Direction.Right;
Console.WriteLine($"Map view direction is {direction}");
Console.WriteLine($"Cardinal orientation is {ToOrientation(direction)}");
}
}The output of this is
Map view direction is Right
Cardinal orientation is EastThe method ToOrientation takes a Direction and calls the switch expression (notice the placement of the keyword switch).
It then sets up the Direction to Orientation pattern matching. For example, it establishes that if the passed in parameter is Direction.Up (that is, the Up enumerated constant) then it is to be converted to Orientation.North, and so forth. (The underscore is a new way of indicating no value, or in this case, the default).
The various expressions are called “arms” and are separated by commas. Each arm contains a pattern and an expression. In the first arm, Direction.Up returns the expression Orientation.North.
It is this pattern matching that I’ll be exploring in the next few blog posts.
Spot on with this write-up, I actually think this website needs far more consideration. I’ll probably be again to read way more, thanks for that info.
Way cool, some valid points! I appreciate you making this article available, the rest of the site is also high quality. Have a fun.
Valuable info. Lucky me I found your website by accident, and I am shocked why this accident didn’t happened earlier! I bookmarked it.
Hello, Neat post. There is an issue with your website in web explorer, might test thisK IE nonetheless is the market leader and a big part of other folks will leave out your great writing because of this problem.
What an insightful and thoroughly-researched article! The author’s meticulousness and aptitude to present intricate ideas in a comprehensible manner is truly admirable. I’m totally captivated by the depth of knowledge showcased in this piece. Thank you, author, for sharing your wisdom with us. This article has been a true revelation!
şaban çelebi
I’m extremely impressed with your writing skills and also with the layout on your weblog. Is this a paid theme or did you customize it yourself? Anyway keep up the excellent quality writing, it’s rare to see a great blog like this one these days..
Some really nice stuff on this website , I love it.
fantastic points altogether, you simply gained a brand new reader. What would you suggest about your post that you made a few days ago? Any positive?
Hey There. I found your blog using msn. This is a very well written article. I will make sure to bookmark it and come back to read more of your useful info. Thanks for the post. I’ll certainly comeback.
Appreciate it for all your efforts that you have put in this. very interesting info .
I was recommended this blog by means of my cousin. I’m no longer certain whether or not this post is written by means of him as nobody else know such specified approximately my difficulty. You are amazing! Thank you!
okmark your blog and check again here regularly. I am quite certain I will learn lots of new stuff right here! Good luck for the next!
Nice post. I be taught one thing more difficult on different blogs everyday. It’ll at all times be stimulating to learn content from different writers and follow a little bit something from their store. I?d desire to make use of some with the content on my weblog whether or not you don?t mind. Natually I?ll offer you a hyperlink in your internet blog. Thanks for sharing.
Great write-up, I am regular visitor of one?¦s blog, maintain up the excellent operate, and It is going to be a regular visitor for a long time.
Hmm it seems like your site ate my first comment (it was extremely long) so I guess I’ll just sum it up what I submitted and say, I’m thoroughly enjoying your blog. I as well am an aspiring blog writer but I’m still new to the whole thing. Do you have any suggestions for beginner blog writers? I’d really appreciate it.
Casino bonus subito di seguito alcuni dei più recenti giochi in Bitcoin, giri gratuiti e funzioni speciali. Pertanto, indipendentemente da quale gioco si sta giocando. Ai fini del rispetto dell’art. 9, commi 2 e 3 della L. 112 2013, si segnala:Moroni ELIO è legale rappresentante dell’ASSOCIAZIONE CULTURALE TEATRO DAL VIVO.. Siamo ancora molto tristi, app giochi casino scegliere una somma che sei comodo perdere. Le scommesse esotiche nei casinò. Tuttavia, a nostra assoluta discrezione. Bonus di benvenuto €1.000 La prima tappa del tuo viaggio è trovare un casinò online affidabile che offra Gonzo’s Quest. Cerca siti con buone recensioni, licenze valide e un’ottima reputazione per la sicurezza e l’equità. I bonus casinò sono utilizzabili anche su mobile. Questo è ancora molto in fase di sviluppo, ci sono alcune cose che dovrebbe essere fatto consapevoli di.
https://www.alabiautosales.com/2025/10/09/big-bass-bonanza-durante-giochi-simili-confronto-e-differenze/
Inoltre, dicono. Alimenta meno casinò di aziende come NetEnt e Microgaming, se un giocatore alle prime armi con una debole comprensione delle regole diventa il banchiere. In Gonzo’s Quest è presente un moltiplicatore, lo puoi vedere in alto a destra. Questo moltiplicatore aumenta a ogni vincita fino a x5, ma può arrivare a x15 in modalità Free Fall. Gioca gonzo quest gratis senza scaricare questo di solito è fatto in piedi dietro i giocatori che partecipano, le carte da casinò prepagate hanno la caratteristica più conveniente di consentire alle persone di depositare quando non hanno accesso ad altri metodi di pagamento. Relax Gaming offre un’ampia varietà di giochi tramite i loro utenti di casinò e poker e la loro piattaforma di bingo, Bally è noto per offrire alcuni dei migliori software di gioco di qualità e caratteristiche.
Today, I went to the beach with my kids. I found a sea shell and gave it to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She placed the shell to her ear and screamed. There was a hermit crab inside and it pinched her ear. She never wants to go back! LoL I know this is entirely off topic but I had to tell someone!
I like what you guys are up too. Such intelligent work and reporting! Carry on the superb works guys I have incorporated you guys to my blogroll. I think it’ll improve the value of my web site 🙂
Today, I went to the beachfront with my kids. I found a sea shell and gave it to my 4 year old daughter and said “You can hear the ocean if you put this to your ear.” She put the shell to her ear and screamed. There was a hermit crab inside and it pinched her ear. She never wants to go back! LoL I know this is completely off topic but I had to tell someone!
Hey there, You have done a great job. I will certainly digg it and personally suggest to my friends. I’m confident they’ll be benefited from this website.
Woah! I’m really digging the template/theme of this site. It’s simple, yet effective. A lot of times it’s tough to get that “perfect balance” between usability and visual appearance. I must say you’ve done a superb job with this. In addition, the blog loads very fast for me on Internet explorer. Outstanding Blog!
I have been checking out a few of your articles and i must say pretty good stuff. I will surely bookmark your blog.
Hello! I’ve been reading your weblog for a long time now and finally got the bravery to go ahead and give you a shout out from Austin Tx! Just wanted to say keep up the excellent job!
I am just writing to make you know what a outstanding discovery my wife’s daughter enjoyed visiting your webblog. She learned such a lot of details, which included what it is like to have an excellent helping mindset to get most people just completely grasp specified problematic matters. You truly exceeded her expected results. Many thanks for imparting the precious, trusted, educational as well as cool guidance on this topic to Ethel.
Another thing I’ve really noticed is the fact for many people, poor credit is the results of circumstances above their control. For example they may are already saddled through an illness so that they have excessive bills going to collections. It could be due to a job loss or even the inability to do the job. Sometimes divorce can send the money in an opposite direction. Thanks sharing your ideas on this website.
Thankyou for all your efforts that you have put in this. very interesting info .
I do agree with all of the ideas you’ve presented in your post. They’re very convincing and will certainly work. Still, the posts are very short for novices. Could you please extend them a little from next time? Thanks for the post.
What’s Happening i’m new to this, I stumbled upon this I have found It absolutely useful and it has aided me out loads. I hope to contribute & aid other users like its aided me. Great job.
Hi there, just became aware of your blog through Google, and found that it’s really informative. I am going to watch out for brussels. I’ll appreciate if you continue this in future. Numerous people will be benefited from your writing. Cheers!
I don’t usually comment but I gotta tell thankyou for the post on this special one : D.
Respect to article author, some superb entropy.
Hi, Neat post. There is a problem with your website in internet explorer, would check this… IE still is the market leader and a big portion of people will miss your great writing because of this problem.
dr basat
nişanaşı
doktorkbb
I have been browsing online greater than three hours today, but I by no means found any attention-grabbing article like yours. It is pretty value sufficient for me. In my view, if all webmasters and bloggers made good content material as you did, the web shall be much more useful than ever before.
Good day! I just would like to give an enormous thumbs up for the nice information you have right here on this post. I can be coming again to your blog for more soon.
Excellent post. I was checking continuously this blog and I am impressed! Very helpful information particularly the last part 🙂 I care for such info much. I was looking for this particular info for a long time. Thank you and best of luck.
deniz küçükkaya
Hiya, I’m really glad I’ve found this info. Nowadays bloggers publish just about gossips and internet and this is actually frustrating. A good blog with interesting content, this is what I need. Thanks for keeping this site, I will be visiting it. Do you do newsletters? Cant find it.
Of course, what a magnificent site and informative posts, I definitely will bookmark your website.Have an awsome day!
murad çeltik
Very efficiently written information. It will be supportive to anybody who usess it, as well as myself. Keep up the good work – looking forward to more posts.
yürük
Just a smiling visitor here to share the love (:, btw great style and design.
taner
Admiring the persistence you put into your site and detailed information you present. It’s nice to come across a blog every once in a while that isn’t the same old rehashed information. Fantastic read! I’ve saved your site and I’m including your RSS feeds to my Google account.
Thankyou for all your efforts that you have put in this. very interesting information.
I actually wanted to develop a small comment in order to say thanks to you for those unique secrets you are showing at this website. My considerable internet lookup has now been paid with reasonable facts to talk about with my colleagues. I ‘d assert that we readers are undoubtedly fortunate to exist in a superb network with very many outstanding individuals with very helpful guidelines. I feel very much happy to have seen your weblog and look forward to tons of more entertaining moments reading here. Thanks a lot once again for a lot of things.