FileStream

Thank you very much for your help.

The thing is that, when I  first got the exception, I deleted  the file manually in the Pharo folder so I'm pretty sure it doesn't exist.

Maybe that when I do: "aStream := FileStream newFileNamed:filename" Pharo looks everywhere in my computer than it might find a file named 'test'

or with a part of it named which is 'test'...but the file was created in the Pharo folder so I assume it must look only there to find a file, no?

alex

2010/11/28 Levente Uzonyi <[hidden email]>

On Sat, 27 Nov 2010, alexandre bp wrote:

Hi,

I'm having trouble with the FileStream....

I have tried several things:
filename := 'test'.
aStream := StandardFileStream new.
1) aStream := FileStream newFileNamed:filename.
2) aStream := filename asFilename writeStream.

1) this solution worked one time but when I tried to create other
files with other names (whatever the name) I get an exception:
FileExistsException
2) doesn't work at all. I get an exception as well:
MessageNotUnderstood: ByteString>>asFilename.

How to use FileStreams?

existingReadOnlyFile := FileStream readOnlyFileNamed: 'foo'. "raises an exception if the file doesn't exist"
existingReadableAndWriteableFile := FileStream oldFileNamed: 'foo'. "raises an exception if the file doesn't exist"
readableAndWriteableFile := FileStream fileNamed: 'foo'. "automatically creates the file if it doesn't exist"
newReadableAndWriteableFile := FileStream newFileNamed: 'foo'. "raises an exception if the file exists"
newReadableAndWriteableFile := FileStream forceNewFileNamed: 'foo'. "deletes the file if it exists"

All of these methods have a do: variant. For example:
FileStream readOnlyFileNamed: 'foo' do: [ :file | file contents "This will close the file and return it's contents." ].

When to use StandardFileStream?
Only when you don't need character encoding or line-end conversion.

I don't know what to do.... I don't understand why I have the
exception FileExistsException even thought the name I give to filename
is different...

Are you sure that the file doesn't exist? Some systems (windows and most macs) are case insensitive, so if you have a file named 'TEST', then you also have 'test' and 'Test', etc.


Levente

Thx for your help

alex

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You are right!

sorry I didn't know there were a different mailinglist for pharo.

cheers

alex

2010/11/30 Mariano Martinez Peck <[hidden email]>

Alexandre, maybe you will receive more answers if you ask directly in the pharo mailing list instead of seaside, since Files doesn't have anything to do with seaside ;)

http://www.pharo-project.org/community

On Mon, Nov 29, 2010 at 10:20 PM, alexandre bp <[hidden email]> wrote:

Thank you very much for your help.

The thing is that, when I  first got the exception, I deleted  the file manually in the Pharo folder so I'm pretty sure it doesn't exist.

Maybe that when I do: "aStream := FileStream newFileNamed:filename" Pharo looks everywhere in my computer than it might find a file named 'test'

No, that shouldn't happen. What if you do  FileDirectory defaul newFileNamed: filename

does it work?

BTW..did you read Pharo by Example?  Because there is a whole chapter explaining Streams and files....I am very bad with them, I always forget how to do trivial things and I need to check there...

http://pharobyexample.org/

Cheers

Mariano
 

or with a part of it named which is 'test'...but the file was created in the Pharo folder so I assume it must look only there to find a file, no?

yes
 

alex

2010/11/28 Levente Uzonyi <[hidden email]>

On Sat, 27 Nov 2010, alexandre bp wrote:

Hi,

I'm having trouble with the FileStream....

I have tried several things:
filename := 'test'.
aStream := StandardFileStream new.
1) aStream := FileStream newFileNamed:filename.
2) aStream := filename asFilename writeStream.

1) this solution worked one time but when I tried to create other
files with other names (whatever the name) I get an exception:
FileExistsException
2) doesn't work at all. I get an exception as well:
MessageNotUnderstood: ByteString>>asFilename.

How to use FileStreams?

existingReadOnlyFile := FileStream readOnlyFileNamed: 'foo'. "raises an exception if the file doesn't exist"
existingReadableAndWriteableFile := FileStream oldFileNamed: 'foo'. "raises an exception if the file doesn't exist"
readableAndWriteableFile := FileStream fileNamed: 'foo'. "automatically creates the file if it doesn't exist"
newReadableAndWriteableFile := FileStream newFileNamed: 'foo'. "raises an exception if the file exists"
newReadableAndWriteableFile := FileStream forceNewFileNamed: 'foo'. "deletes the file if it exists"

All of these methods have a do: variant. For example:
FileStream readOnlyFileNamed: 'foo' do: [ :file | file contents "This will close the file and return it's contents." ].

When to use StandardFileStream?
Only when you don't need character encoding or line-end conversion.

I don't know what to do.... I don't understand why I have the
exception FileExistsException even thought the name I give to filename
is different...

Are you sure that the file doesn't exist? Some systems (windows and most macs) are case insensitive, so if you have a file named 'TEST', then you also have 'test' and 'Test', etc.


Levente

Thx for your help

alex

_______________________________________________
seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

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seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
seaside mailing list
[hidden email]
http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside

_______________________________________________
seaside mailing list
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