A Silly 390 Linux Question
07-06-2005
ITYM 470V-6.
No, you're mixing apples and oranges. The ISAM format made it possible for the editor to insert records without having to rewrite the entire file, but that had nothing to do with renumbering. Plenty of line editors, before and after, were perfectly capable of updating a source file without disturbing existing line numbers. In fact, the standard editors in IBM's flagship operating system behave like that.
It was true, but not because of card and tape heritage. I've worked on other systems that were card and tape based but that supported character-delimited records. The real reason is that character-delimited records are a bad idea.
IBM's flagship operating systems include Unix subsystems, and the FTP includes support for translating character-oriented files from between IBM formats and Unix format.
No, and I don't see the point of it as long as the *ix community is not interested in supporting such files.
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