Array Equality

[Tony Nassar]

Hello, all!

There's no documentation of an overriden Equals() method for arrays, and
there does not seem to be one in fact, since any of these assertions will
crash:
int[] x = { 0, 1 };
int[] y = { 0, 1 };

// System.Diagnostics.Debug.Assert(x == y, "Arrays equal?");
// System.Diagnostics.Debug.Assert(Array.Equals(x, y), "Arrays equal?");
// System.Diagnostics.Debug.Assert(x.Equals(y), "Arrays equal?");

Obviously I can loop through them, but do I have to?

Tony Nassar
The Analysis Corp.
703-208-9630

[Jon Skeet [C# MVP]]

Tony Nassar <tn*****@theanalysiscorp.com> wrote:

There's no documentation of an overriden Equals() method for arrays, and
there does not seem to be one in fact, since any of these assertions will
crash:
int[] x = { 0, 1 };
int[] y = { 0, 1 };

// System.Diagnostics.Debug.Assert(x == y, "Arrays equal?");
// System.Diagnostics.Debug.Assert(Array.Equals(x, y), "Arrays equal?");
// System.Diagnostics.Debug.Assert(x.Equals(y), "Arrays equal?");

Obviously I can loop through them, but do I have to?

Yes, I believe you do.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too

[Tony Nassar]

Oh, I know I do; don't worry about that. But I must say, it's peculiar that
the '==' operator returns 'false' in this case! A "not implemented
exception" I could understand, but 'false'?

[Jon Skeet [C# MVP]]

Tony Nassar <tn*****@theanalysiscorp.com> wrote:

Oh, I know I do; don't worry about that. But I must say, it's peculiar that
the '==' operator returns 'false' in this case! A "not implemented
exception" I could understand, but 'false'?

Why would it *not* return false? It's just using object==, which
compares two references.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
If replying to the group, please do not mail me too