New in .NET 9.0 (18): Searchwalues ​​and Priority Queue Embarrassment

Class is already introduced in .NET 8.0 System.Buffers.SearchValues Now the method is Create() Not only to search for individual characters, but also another surcharge for the whole wire in a separate string:

// In .NET 8.0 möglich
SearchValues digits = SearchValues.Create("0123456789");
string text1 = "Hinweis: Der Buchstabe A hat in der ASCII-Tabelle den Wert 97.";
var positionDerErstenZiffer = text1.AsSpan().IndexOfAny(digits);
Console.WriteLine(positionDerErstenZiffer); // 59
 
// Ab .NET 9.0 möglich
SearchValues artikel =
SearchValues.Create(("der", "die", "das"), StringComparison.OrdinalIgnoreCase);
string text2 = "Hinweis: Der Buchstabe A hat in der ASCII-Tabelle den Wert 97.";
var positionDesErstenArtikels = text2.AsSpan().IndexOfAny(artikel);
Console.WriteLine(positionDesErstenArtikels); // 9

Remove the element from flexibility

PriorityQueue-Class, already introduced in .NET 6.0, is now one Remove()-Methode can be used to remove elements, even if they are not bend. Remove() As a parameter, the removed element expanded.

Remove() Distribute three values: As an withdrawal value, a booler value that shows that the element was present and it could be removed. The second and third method comes through in parameters out Removed elements and its priority.

Shows the use of the following code method Remove In class PriorityQueue,

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public void PriorityQueueRemove()
{
 CUI.Demo();
 
 CUI.H2("PriorityQueue erstellen");
 var q = new PriorityQueue();
 q.Enqueue("www.dotnet-doktor.de", 20);
 q.Enqueue("www.dotnet7.de", 2);
 q.Enqueue("www.IT-Visions.de", 10);
 q.Enqueue("www.dotnet-lexikon.de", 30);
 q.Enqueue("www.dotnet8.de", 3);
 q.Enqueue("www.dotnet9.de", 1);
 
 Console.WriteLine($"Elemente in der PriorityQueue: {q.Count}"); // 0
 
 CUI.H2("Entferne vorhandenes Element aus der PriorityQueue mit Remove()");
 bool b1 = q.Remove("www.dotnet7.de", out string e1, out int priority1); // .NET 7.0 raus, da Out of Support!!! 
 if (b1) Console.WriteLine($"Element {e1} mit Priorität {priority1} wurde entfernt!");
 else Console.WriteLine("Element nicht gefunden");
 Console.WriteLine($"Elemente in der PriorityQueue: {q.Count}"); // 0
 
 CUI.H2("Versuch, nicht vorhandenes Element aus der PriorityQueue zu entfernen mit Remove()");
 bool b2 = q.Remove("www.dotnet7.de", out string e2, out int priority2);
 if (b2) Console.WriteLine($"Element {e2} mit Priorität {priority2} wurde entfernt!");
 else Console.WriteLine("Element nicht gefunden");
 
 CUI.H2($"Alle Elemente {q.Count} aus der Warteschlange holen mit Dequeue()"); // 5
 var count = q.Count;
 for (int i = 0; i < count; i++)
 {
  var current = q.Dequeue();
  Console.WriteLine(i + ": " + current);
 }
 
 Console.WriteLine($"Verbliebene Elemente in der PriorityQueue: {q.Count}"); // 0
}

(RME)