Convert a string representation of a number to int[] in C#

Question

What is the shortest C# statement that will convert a string representation of a number to an int[] that contains each digit?

string number = "1234";
number.Array.ConvertAll(line.ToCharArray(), c => Int32.Parse(c.ToString()));
number.ToCharArray().Select(i => Convert.ToInt32(i.ToString())).ToArray();
number.Select(i => Int32.Parse(i.ToString())).ToArray();
number.Select(i => i - '0').ToArray();

Can anyone beat my last approach?

Answer 1

28 bytes

You can make your last approach a bit shorter by replacing the '0' by 48. You can also strip all unnecessary spaces and use 1-char variable names (for example, number -> n):

n.Select(i=>i-48).ToArray();

Answer 2

C# without LINQ, 97 86 82 bytes

var n=Console.ReadLine();int i=n.Length;var o=new int[i];while(i>0)o[--i]=n[i]-48;

I've been hanging in the shadows for a while and wanted to try this out. I'm no golfer, or even that experienced with C#, but I wanted to see how small I could get it on my own, without using LINQ. It's nothing special, but at least I had my fun.

I wasn't planning on posting this at first, since it's much longer than any good LINQ solution and doesn't really belong here, but I'm kinda curious if there is a shorter way to do it without LINQ.

Edit 1: Instead of int.Parse it now substracts 48 from the char's ASCII code. Well, that's already much better. 2: Now with var instead of string and int[].

Answer 3

76 bytes

number.ToCharArray().Select(var=>Convert.ToInt32(var.ToString())).ToArray();