[on] why can't I write on a WriteStream on an OrderedCollection?

>
> Can anyone explain to me why this works fine:
>
> ((WriteStream on: (Array new)) nextPut: #foo) contents.
>
> but this doesn't?
>
> ((WriteStream on: (OrderedCollection new)) nextPut: #foo) contents.
>
> The debugger shows that WriteStream>>nextPut: invokes
> WriteStream>>pastEndPut: which invokes at:put: on the collection.
>
> This is ok for an array, but not for an OrderedCollection, as
> OrderedCollection>>at:put: explicitly states it cannot be used to
> append stuff to the end of the collection.
>
> Is it a bug in WriteStream that it sends at:put:, or does it just not
> make sense to have a WriteStream on an Ordered Collection?
>
> (This is related to the split and join methods -- because of this
> limitation, an OrderedCollection cannot be used as a joiner, it seems.)
>
> - on
>
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

>
> Can anyone explain to me why this works fine:
>
> ((WriteStream on: (Array new)) nextPut: #foo) contents.
>
> but this doesn't?
>
> ((WriteStream on: (OrderedCollection new)) nextPut: #foo) contents.
>
> The debugger shows that WriteStream>>nextPut: invokes
> WriteStream>>pastEndPut: which invokes at:put: on the collection.
>
> This is ok for an array, but not for an OrderedCollection, as
> OrderedCollection>>at:put: explicitly states it cannot be used to
> append stuff to the end of the collection.
>
> Is it a bug in WriteStream that it sends at:put:, or does it just not
> make sense to have a WriteStream on an Ordered Collection?
>
> (This is related to the split and join methods -- because of this
> limitation, an OrderedCollection cannot be used as a joiner, it  
> seems.)
>
> - on
>
>
> _______________________________________________
> Pharo-project mailing list
> [hidden email]
> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
>

> On Sat, Apr 11, 2009 at 7:39 PM, Oscar Nierstrasz <[hidden email]> wrote:
>> Can anyone explain to me why this works fine:
>>
>> ((WriteStream on: (Array new)) nextPut: #foo) contents.
>>
>> but this doesn't?
>>
>> ((WriteStream on: (OrderedCollection new)) nextPut: #foo) contents.
>
> You should have listened when I presented Nile at ESUG some years ago :-)
>
> --
> Damien Cassou
> http://damiencassou.seasidehosting.st
>
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>