Question

I have a list of string values that I want add to a hashtable or other array that can be accessed by key/index but cannot implement it. I have this working how I want but its ugly

        List<string> valueList = new List<string>();
        valueList.Add("1");
        valueList.Add("2");
        valueList.Add("3");

        Hashtable p = new Hashtable();


        valueList.ForEach(delegate(string f) { p.Add(valueList.FindIndex(v => v == f), f); });

EDIT: After James reminded me that a List will return values by index I went with a List and this is what I have ended up with

valueList.ForEach(f => sequenceList.Add(int.Parse(f)));

Answer 1

Try this:

valueList.ForEach(x => htable.Add(valueList.FindIndex(y => y == x), x));

Although, there’s really no reason not to use a for here

for (var index = 0; index < valueList.Count; index++)
{
    htable.Add(index, valueList[index]);
}

It’s more lines of code, but it’s more straightforward and will perform much better (findIndex is far less efficient than using the index from the for statement).