Re: Prepending Data to a File
- To: mathgroup at smc.vnet.net
- Subject: [mg117001] Re: Prepending Data to a File
- From: Armand Tamzarian <mike.honeychurch at gmail.com>
- Date: Mon, 7 Mar 2011 05:47:57 -0500 (EST)
- References: <ikvohr$f58$1@smc.vnet.net>
On Mar 6, 9:44 pm, Gregory Lypny <gregory.ly... at videotron.ca> wrote: > Hello David, > > Thanks for responding. Appending would work fine as well. How do I do that in Mathematica? > > Regards, > > Gregory > > > 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 The OpenAppend documentation has examples that look like what you need. Mike