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c#f#base-class-librarystructural-equality

StructuralComparisons for arrays

In F#:

[0] = [0] = true

In C# or .NET BCL in general:

StructuralComparisons.Equals(new int[] { 0 }, new int[] { 0 }) == false

Why?

Postscript:

The reason I thought I had the "right" Equals was because this turned out to be true:

var a = new { X = 3, Y = new { Z = -1 } };
var b = new { X = 3, Y = new { Z = -1 } };

StructuralComparisons.Equals(a, b) == true;
Solution

  • That's because you're going down to object.Equals(objA, objB) which won't be able to handle that kind of comparison.

    Instead do this:

    StructuralComparisons.StructuralEqualityComparer.Equals(..., ...)