Re: [BLACKBOX] Simple ASCII text editor example

From: Campbell, Robert (SELEX GALILEO, UK) <robert.d.campbell{([at]})nowhere.xy>
Date: Fri, 6 Aug 2010 08:49:27 +0100

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Stephen,

Just guessing, but have you tried suitably placed calls to:

 Files.File.Flush ?

Cheers

Robert


>> -----Original Message-----
>> From: BlackBox [mailto:BLACKBOX{([at]})nowhere.xy
>> Of Stephen R. Troy
>> Sent: 06 August 2010 03:30
>> To: BLACKBOX{([at]})nowhere.xy
>> Subject: [BLACKBOX] Simple ASCII text editor example
>>
>> *** WARNING ***
>>
>> This message has originated outside your organisation,
>> either from an external partner or the Global Internet.
>> Keep this in mind if you answer this message.
>>
>> Hello List,
>> I am working with a database program which exports the data
>> as an ASCII text file. I have been writing programs to
>> generate additional reports from this ASCII data file. I
>> want to add a function to filter out certain unnecessary
>> lines in the ASCII data, so I want to read the ASCII file
>> line by line, and (a) if the read lines are not the ones to
>> filter out, write them back to the file; or (b) if they are
>> the ones to filter out, NOT write them back; i.e. I want to
>> read and write in the same ASCII text file. The Blackbox
>> documentation indicates I can have a reader rider (scanner)
>> and a writer rider (formatter) connected to the same file;
>> however the documentation for the ASCII text file example
>> (ObxAscii Docu) states "Mixed reading and writing on the
>> same text is not very common and is therefore not supported
>> in this simple model." I have tried a simple program with
>> both a TextMappers.Scanner and a TextMappers.Formatter.
>> This works as expected with only the Scanner, but as soon as
>> I add the Formatter, the Scanner becomes unstable, jumps
>> backward and repeats characters already read. Does anybody
>> have an example of a simple ASCII text editor, which reads
>> and writes to the same file, that they would be willing to
>> share? Thanks for any suggestions.
>> Stephen Troy
>>
>>
>>
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Received on Fri Aug 06 2010 - 09:49:27 UTC