Problem comparing items implementing IComparable

Question

I am working on a extension method where it finds the min item by specific selector. Below the code

    public static T MinBy(this IEnumerable<         


        

Answer 1

IComparable doesn't provide operator support - you need to use current.CompareTo(min). Or better, use Comparer.Default.Compare(current,min) - then you can drop the constraint and it'll handle nulls etc automatically, and it'll avoid boxing.

var comparer = Comparer.Default;
...
// loop
    if(comparer.Compare(current, min) < 0) {...}