Check if List values are consecutive

Question

List dansConList = new List();
dansConList[0] = 1;
dansConList[1] = 2;
dansConList[2] = 3;

List dansRandomList = new List

        

Answer 1

You can use this extension method:

public static bool IsConsecutive(this IEnumerable ints )
{
    //if (!ints.Any())
    //    return true; //Is empty consecutive?
    // I think I prefer exception for empty list but I guess it depends
    int start = ints.First();
    return !ints.Where((x, i) => x != i+start).Any();
}

Use it like this:

[Test]
public void ConsecutiveTest()
{
    var ints = new List {1, 2, 4};
    bool isConsecutive = ints.IsConsecutive();
}