Comparing Array Objects

[Raphael Iloh]

Hi all, I'm having problems comparing array objects. Take a look at this:

int[] array1 = new int[]{1};
int[] array2 = new int[]{1};
Console.Writeln(array1.Equals(array2));

One would expect the above expression to return true as both arrays are
identically the same but it keeps returning false. Any info on how to solve
this problem will be appreciated.

--
Regards,
Raphael Iloh (www.ilohraphael.net)
MCP, MCAD (C#)
This Posting is provided "AS IS", with no warranties and confers no rights.

[Martin Honnen]

Raphael Iloh wrote:

Hi all, I'm having problems comparing array objects. Take a look at this:

int[] array1 = new int[]{1};
int[] array2 = new int[]{1};
Console.Writeln(array1.Equals(array2));

One would expect the above expression to return true as both arrays are
identically the same but it keeps returning false. Any info on how to solve
this problem will be appreciated.

Look at the definition for Object.Equals, it will tell you that for
reference types (which Arrays are) two references are equal if they
refer to the same object. You have two distinct array objects thus the
method yields false.
--

Martin Honnen
http://JavaScript.FAQTs.com/

[Jon Skeet [C# MVP]]

Martin Honnen <Ma***********@t-online.de> wrote:

Look at the definition for Object.Equals, it will tell you that for
reference types (which Arrays are) two references are equal if they
refer to the same object. You have two distinct array objects thus the
method yields false.

Only if Array doesn't provide an override for the Equals method (as,
for instance, String does). As it happens, it doesn't - but it's not an
unreasonable expectation for it to.

To the OP: you basically have to walk the contents of the arrays to
check whether or not they're equal.

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet
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