Re: [BLACKBOX] Simple ASCII text editor example

From: Douglas G. Danforth <"Douglas>
Date: Thu, 5 Aug 2010 19:52:33 -0700

----boundary-LibPST-iamunique-618918184_-_- Content-type: text/plain Stephen, I suggest you write to a temporary file and when done delete the original file Files.dir.Delete(loc, name) and then register the temporary file tmp.Register(name, type, ask, res) with the name of the original file. That should get you want you want. -Doug Danforth Stephen R. Troy wrote: 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 ---- To unsubscribe, send a message with body "SIGNOFF BLACKBOX" to LISTSERV{([at]})nowhere.xy ---- To unsubscribe, send a message with body "SIGNOFF BLACKBOX" to LISTSERV{([at]})nowhere.xy ----boundary-LibPST-iamunique-618918184_-_- Content-type: application/rtf Content-transfer-encoding: base64 Content-Disposition: attachment; filename="rtf-body.rtf" e1xydGYxXGFuc2lcYW5zaWNwZzEyNTJcZnJvbWh0bWwxIFxkZWZmMHtcZm9udHRibA0Ke1xmMFxm c3dpc3NcZmNoYXJzZXQwIEFyaWFsO30NCntcZjFcZm1vZGVybiBDb3VyaWVyIE5ldzt9DQp7XGYy XGZuaWxcZmNoYXJzZXQyIFN5bWJvbDt9DQp7XGYzXGZtb2Rlcm5cZmNoYXJzZXQwIENvdXJpZXIg TmV3O319DQp7XGNvbG9ydGJsXHJlZDBcZ3JlZW4wXGJsdWUwO1xyZWQwXGdyZWVuMFxibHVlMjU1 O30NClx1YzFccGFyZFxwbGFpblxkZWZ0YWIzNjAgXGYwXGZzMjQgDQp7XCpcaHRtbHRhZzI0MyA8 IURPQ1RZUEUgaHRtbCBQVUJMSUMgIi0vL1czQy8vRFREIEhUTUwgNC4wMSBUcmFuc2l0aW9uYWwv L0VOIj59DQp7XCpcaHRtbHRhZzMgXHBhciB9DQp7XCpcaHRtbHRhZzE5IDxodG1sPn0NCntcKlxo dG1sdGFnMiBccGFyIH0NCntcKlxodG1sdGFnMzQgPGhlYWQ+fQ0Ke1wqXGh0bWx0YWcxIFxwYXIg 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