Welcome to the Lounge

Eric Lynch wrote:

Rock on!

Marc Clifton wrote:

I think I saw Elvis!

if (nThatVeryLongVariableYourMateNamed.Excludes(0,1,2))

int n = nThatVeryLongVariableYourMateNamed;
if (n == 0 || n == 1 || n == 2)
{
}

switch(nThatVeryLongVariableYourMateNamed)
{
  case 0:
  case 1
  case 2
    break;
}

private static readonly HashSet<int> validValues = new HashSet<int> { 0, 1, 2};
.
.
.
if (validValues.Contains(nThatVeryLongVariableYourMateNamed))
{
}

if (new int[] { 0, 1, 2}.Contains(nThatVeryLongVariableYourMateNamed))
{
}

Result: Integer;
...
if aPrompt and not (Result in [0, 1, 2, 4]) then
...

static class Extensions
{

    public static bool In<T>(this T item, params T[] items)
    {
        if (items == null)
            throw new ArgumentNullException("items");

        return items.Contains(item);
    }

}

class Program
{

    static void Main()
    {

        int myValue = 1;

        if (myValue.In(1, 2, 3))
            // Do Somthing...

        string ds = "Bob";

        if (ds.In("andy", "joel", "matt")) 
        // Do Someting...
    }
}

public static class SomeExtensions
{
    public static bool IsOneOf<T>(this T value, params T[] options)
    {
        if (options is null || options.Length == 0) return false;
        return Array.IndexOf(options, value) != -1;
    }
    
    public static bool IsNotOneOf<T>(this T value, params T[] options)
    {
        if (options is null || options.Length == 0) return true;
        return Array.IndexOf(options, value) == -1;
    }
}

...

if (nThatVeryLongVariableYourMateNamed.IsNotOneOf(0, 1, 2))