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Re: Prepending Data to a File

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  • Subject: [mg116977] Re: Prepending Data to a File
  • From: Gregory Lypny <gregory.lypny at>
  • Date: Sun, 6 Mar 2011 05:43:27 -0500 (EST)

Hello David,

Thanks for responding.  Appending would work fine as well.  How do I do that in Mathematica?



> I don't think there is any solution to this which does not amount to 
> creating a new file with the data to be prepended, and then appending 
> the other data to it, possibly followed by erasing the original file and 
> renaming the new file. This obviously gets expensive if the file is very 
> large.
> The problem is that operating systems don't usually offer a way to 
> perform prepending to files, so neither do computer languages.
> Have you thought about storing the file in reverse order, so that you 
> can simply append to it, and then reversing the whole file again if 
> necessary?
> It may be worth telling us a little more about your problem.
> David Bailey

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