Lists

A list is similar to an array, but the elements in a list can be inserted and removed dynamically. The C# generic collection List<T> class requires all elements be of the same type T.

Add Items

var namen = new List<string>();
// Hinzufügen von Elementen
namen.Add("Anna");
namen.Add("Bernd");
// Einfügen eines Elements an einem bestimmten Index (Index 1)
namen.Insert(1, "Dieter");

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List Contains

bool enthältClara = namen.Contains("Clara");
Console.WriteLine($"Enthält Clara? {enthältClara}");

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List Remove, RemoveAt

// per Wert
namen.Remove("Bernd");
// per Index
namen.RemoveAt(0);

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Liste Sortieren

namen.Sort();
Console.WriteLine("Sortierte Liste:");
namen.ForEach(Console.WriteLine);

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List Reverse

namen.Reverse();
Console.WriteLine("Umgekehrte Liste:");
namen.ForEach(Console.WriteLine);

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Ein Element suchen (erster Treffer)

string nameMitC = namen.Find(name => name.StartsWith("C"));
Console.WriteLine($"Erster Name, der mit 'C' beginnt: {nameMitC}");

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Suchen Aller Elemente die ...

List<string> langeNamen = namen.FindAll(name => name.Length > 4);
Console.WriteLine("Namen mit mehr als 4 Zeichen:");
langeNamen.ForEach(Console.WriteLine);

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List to Array

string[] namenArray = namen.ToArray();
Console.WriteLine("Array-Ausgabe:");
foreach (var n in namenArray)
{
	Console.WriteLine(n);
}

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Liste leeren

namen.Clear();
Console.WriteLine($"Anzahl der Elemente nach Clear: {namen.Count}");

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List of Objects

var players = new List<Player>();

var player1 = new Player("Chad");
var player2 = new Player("Steve");
var player3 = new Player("Karen");

players.Add(player1);
players.Add(player2);
players.Add(player3);

foreach (Player player in players)
{
	Console.WriteLine(player.username);
}

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List of Anonymous Objects

var players = new List<Player>();

players.Add(new Player("Chad"));
players.Add(new Player("Steve"));
players.Add(new Player("Karen"));

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