in reply to Re: Redirecting/Restoring of Memory Files
in thread Redirecting/Restoring of Memory Files

Perl does have a feature of being able to open a file handle/stream on a string buffer rather than external media. There are several reasons why it is sometimes useful to treat a string as if it were a file. Three reasons that come to mind:

For more information on this feature of Perl, see open and search for the phrase "Perl scalars". I believe support has been part of the Perl core since 5.8 (which is why I presume Disciplus tested that version - which is really old). See also IO::Scalar and IO::String. IO::Scalar can be used to bring support for in memory/scalar backed file handles to even earlier versions of Perl.

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Re^3: Redirecting/Restoring of Memory Files
by flexvault (Monsignor) on Jun 25, 2015 at 18:42 UTC

    Thank you ELISHEVA,

    It's always good to learn something new, and doing I/O to a string is new to me. Since I use 'diff' a lot in *nix and also have my own editor for working with development files, I'm not sure how often I would use it.

    As far as your 'black hole', you'll see the same with a regular file. I have prematurely closed a file handle and then later added a 'print' statement. No error, no warning and no data. Also if you save a file handle to disk and then retrieve, you need some 'Perl magic' to get it to be valid file handle again.

    Thanks for the updated information...Ed


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