Because all 16 elements of the first/top ordered collection contain the exact same element. They are all #==, the same instance/object. If you change one, you change them all.
Here is one way to create what I think you want:
OrderedCollection new: 16 streamContents: [ :out |
16 timesRepeat: [ out nextPut: (OrderedCollection new: 16 withAll: 0) ] ]
BTW, Arrays would be better in this case, I think.
> On 30 Apr 2017, at 23:08, frankl1_miky <
[hidden email]> wrote:
>
> Hi everyone,
>
> I'm figuring out a strange behavoir with OrderedCollection. Actually I've
> created a matrix using OrderedCollection like this:
>
> /c := OrderedCollection new: 16 withAll: (OrderedCollection new: 16 withAll:
> 0).
> c./
> But when I try to set the value at row 1 and column 2 to be 50 like this:
> /(c at: 1) at: 2 put: 50/
> I instead get 50 in any cell of the second column and I don't know why.
>
> When using a Matrix and the massage at:at:put, the behavoir is normal.
>
> Why that strange behavoir with OrderedCollection?
>
>
>
> --
> View this message in context:
http://forum.world.st/Implement-Matrix-whith-OrderedCollection-tp4945002.html> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>
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