Question

I’m trying to convert a textbox entry into a Dictionary of double, double. i.e.

Input text is:

1,63
2,31
3,78
4,83

I’m then splitting the row by a comma (,).

I’ve got the code below – but the IEnumerable isnt working. Any help would be much appreciated!!

 string input = txtInput.Text;
    List<string> list = new List<string>(
                               input.Split(new string[] { "\r\n" },
                               StringSplitOptions.RemoveEmptyEntries));

    IEnumerable<Dictionary<double, double>> dict = list.Select(row => row.Split(','))
    .Select(pair => new Dictionary<string, string>(double.Parse(pair[0]), double.Parse(pair[1])));

Answer 1

Sounds like you probably want:

var dictionary = input.Lines
                      .Select(line => line.Split(','))
                      .ToDictionary(array => double.Parse(array[0]),
                                    array => double.Parse(array[1]));

However:

• This assumes the split lines all have the right number of bits (and that you’re using a culture which uses “.” as the decimal separator; otherwise you’re going to have problems)
• This assumes each line has parsable longs in it
• Comparing double values for equalty (required by a dictionary) is generally a bad idea. Can you use int or decimal instead?