Eliminate consecutive duplicates of list elements

Question

Is there a \"nice\" way to eliminate consecutive duplicates of list elements?

Example:

[\"red\"; \"red\"; \"blue\"; \"green         


        

Answer 1

You can create simple generic method for this purpose, like below:

[EDIT 2] (great thanks to Eric Lippert)

    public static List ExcludeConsecutiveDuplicates(List InputList)
    {
        object lastItem = null;
        List result = new List();

        for (int i = 0; i < InputList.Count; i++)
        {
            if (i==0 || Object.Equals(InputList[i],lastItem) != true)
            {
                lastItem = InputList[i];
                result.Add((T)lastItem);
            }
        }

        return result;
    }