带String.Split（）的空字符

Question

I'm working on OBJ files parser, and I need to get information about faces. In OBJ face sometimes looks like that: f 1//1 2//1 3//1 or like that: f 1/1/1 2/4/1 3/2/1 . I'm trying to get these numbers:

int[] facePointerValues = Array.ConvertAll(facePointer.Split('/'), int.Parse);

If " f 1/1/1 2/4/1... " it works, but the problem appears when: " f 1//1 2//1... " because of empty char between "/". How to fix that?

Answer 1

As peeople mentioned in the comments, you can tell Split() to ignore empty entries, but then you'll end up with an array size of 2 instead of 3.

Alternatively, you can selectively use 0 for empty values:

int[] facePointerValues = Array.ConvertAll(facePointer.Split('/'),
                              s => s.Length < 1 ? 0 : int.Parse(s));

This way, you'll still always end up with an array size of 3.