Question

I need in C# to sort some distances in some objects which are in float. I use delegate and Array.Sort to sort them but it seems that I can’t use float.

How can I keep the precision of those float when converting to int?

Is it possible to use Array.Sort with float instead of int in return?

Without using LINQ.

Answer 1

Array.Sort<T>(T[] array, Comparison<T> comparison) is not restricted to any type as long as you provide correct comparison delegate. Comparison delegate should return integer value containing the result of compare operation, not a value to be compared with something. For example, if you have class X with float property Property, you can sort them like this:

public sealed class X
{
    public float Property { get; set; }
}

static void Test()
{
    var arr = new X[]
    {
        new X { Property = 5.5f },
        new X { Property = 2.5f },
        new X { Property = 6.5f },
        new X { Property = 1.2f },
    };
    Array.Sort(arr, (a, b) => a.Property.CompareTo(b.Property));
}