How to remove the first item from a non-foreach array.
I have tried this, but it says that there is no remove or removeAt method.
int[] arr = {1,2,3,4,5};
var removeu = Array.Remove(arr,0);//Agora percebi que isso é javascript, rs
This gives error. How I do? I passed this to a list, but it made a mistake too.
List<int> lista = new List<int>(arr);
lista.Remove(0); // The zero here is not the first index.
How do I do it now?
According to the comment what you want to do is this:
var primeiro = arr.RemoveAt(0);
Only an array does not have the RemoveAt method so you have to create an extension method like this removed from the OS :
public static T[] RemoveAt<T>(this T[] source, int index) {
T[] dest = new T[source.Length - 1];
if(index > 0)
Array.Copy(source, 0, dest, 0, index);
if(index < source.Length - 1)
Array.Copy(source, index + 1, dest, index, source.Length - index - 1);
return dest;
}
If you are always going to add elements at the end and remove them from the beginning, you can use the class Queue , which is a first in first out, that is, whenever you remove it will be from the beginning, example:
Queue<int> fila= new Queue<int>();
fila.Enqueue(1); //adiciona valor 1
fila.Enqueue(2); //adiciona valor 2
fila.Enqueue(3); //adiciona valor 3
fila.Enqueue(4); //adiciona valor 4
fila.Enqueue(5); //adiciona valor 5
fila.Dequeue();//remove o primeiro elemento, neste caso o 1
If this is the case, the best data structure to use is this.