Question

I want to be able to parse a a six digit number and take each character and place in an array for example: "738593" -> d[1] = 7, d[2] = 3. d[3] = 8….etc

private void button2_Click(object sender, EventArgs e)
{
    int[] d = new int[10];
    d1 = Integer.parseInt(String.valueOf(s.charAt(0)));
    d3 = Integer.parseInt(String.valueOf(s.charAt(1)));
    d2 = Integer.parseInt(String.valueOf(s.charAt(2))); //JAVA LINE
    ...
}

I found a line from Java that does exactly what I want but I was looking around for a C# equivalent. Any ideas?

Answer 1

Try:

int[] d = s.Select(c => (int)c - (int)'0').ToArray();

What you are doing here is iterating over each of the characters in the string, converting them to a stream of integers (IEnumerable<int>) then making that stream into an array. This requires C# 3.0 and LINQ.

Alternatively you could try:

int[] d = s.Select(c => int.Parse(c.ToString()).ToArray();

which will throw an exception if the string being passed in is not a string of digits, but may have some performance penalty as for each character in the string a further string is made.

Both these method will work on digit strings of any size*.

^{*that can be stored in memory of course.}