'Liste .foreach ()' und Mutabilität

Question

Ich möchte alle Punkte in einen generationspflichtigen GeneraDicetagcode übersetzen.Das funktioniert: generasacodicetagpre.

aber mit List<T> nicht't: generasacodicetagpre.

Ideen?

Answer 1

Your current code is simply re-assigning the local variable v to a new value - it doesn't refer back to the original value in the list. It's the equivalent of writing:

foreach(int v in PolygonBase)
{
    v += MousePos;
}

To write back to the original value, use ConvertAll:

PolygonBase.ConvertAll(v => v += MousePos);

Answer 2

ForEach is not mutable, it doesn't change the data structure in any way. Check out this threat. Using conditional lambda statements with a foreach Action on a list