How Sort A List By A Part Of That String Desc

Question

i have a list like this :

List list_lines = new List();
list_lines.add(\"name1__pass1__com__14__55\");
list_lines.add(\"name2__pas         


        

Answer 1

The other answers create a new list which is sorted the way you want. If instead you want the same list to be sorted, maybe try something like this:

Func getNum = str => int.Parse(str.Split(Separator, StringSplitOptions.None)[4]);
list_lines.Sort((x, y) => getNum(x).CompareTo(getNum(y)));

This uses an overload of List<>.Sort. If you want descending order, swap x and y in the Comparison<> lambda body.

If your list is very long, this is faster (uses Quick Sort) and doesn't require the memory of a new copy of the list.