Im looking for a nice and convenient way to translate an array encoded as a string back to an array in C#. For example, convert the string "[1.2,24.4,35.5,4.5]" to an array of floats

"[1.2,24.4,35.5,4.5]" -> [1.2,24.4,35.5,4.5]

CodePudding user response：

The array of floats you have presented can be interpreted as JSON. You can use JSON.NET or your preferred JSON serializer to deserialize this to an array in C#.

JSON.NET:

float[] myArray = JsonConvert.DeserializeObject<float[]>("[1.2,24.4,35.5,4.5]");

System.Text.Json:

float[] myArray = JsonSerializer.Deserialize<float[]>("[1.2,24.4,35.5,4.5]");

CodePudding user response：

If you're not going to implement a expression interpreter that more general and more complex. You can do it with regular expression and some linq expression.It maybe simplest. the code as below:

using System;
using System.Linq;
using System.Text.RegularExpressions;

namespace StringToArray
{
    class Program
    {
        static void Main()
        {
            string testString = "[1.2, 24.4, 35.5, 4.5]";
            // It rough mean that have some digit and maybe have comma and some digit after comma.that repeat many times.
            var array = Regex.Matches(testString, @"(\d \.?\d*) ") 
                .Select(group => Convert.ToDouble(group.Value)) // Get digit string and convert to double
                .ToArray(); // Get float array
            foreach (var value in array)
            {
                Console.WriteLine(value); // Output: 1.2, 24.4, 35.5, 4.5
            }
        }
    }
}