在txt文件中读取未知数组维度的双数

Question

我需要更改代码以了解数组在txt文件中的维数，我的代码中只能得到2d数组的维数的问题，例如2 * 2，3 * 3 ...但我需要例如3 * 1

static double[,] ParseNumberFile(string filename) 
{ 
    // read data from txt file 

    string fileContent = File.ReadAllText(filename); 

    // first put all lines into an string array 
    string[] allLines = fileContent.Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries); 

    // calculate 2D array's dimension lengths, and initialize the 2Darray 

    int rowCount = allLines.Length; 
    int columnCount = allLines.Length; 

    int i = 0, j = 0; 
    double[,] result = new double[rowCount, columnCount]; 
    foreach (var row in fileContent.Split(new char[] { '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries)) 
    { 
     j = 0; 
     foreach (var col in row.Trim().Split(' ')) 
     { 
      result[i, j] = double.Parse(col.Trim(), System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo); 
      j++; 
     } 
     i++; 
    } 
    return result; 
} 

Answer 1

你可以使用泛型列表：

List<List<double>> result = new List<List<double>>(); 
foreach (var row in fileContent.Split(new char[] { '\t', '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries)) 
{ 
    List<double> list = new List<double>() 
    foreach (var col in row.Trim().Split(' ')) 
    { 
     list.Add(double.Parse(col.Trim(), System.Globalization.NumberStyles.Any, System.Globalization.NumberFormatInfo.InvariantInfo)); 
    } 
    result.Add(list); 
} 

Answer 2

Linq的方式：

 double[][] doubles = File.ReadAllLines("foo.txt"). 
            Where(line => !string.IsNullOrWhiteSpace(line)). 
            Select(line => line.Split(' ').Select(double.Parse).ToArray()). 
            ToArray(); 

为您节省很多代码;）