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st: Re: adding a filename extension


From   ariley@stata.com (Alan Riley)
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: adding a filename extension
Date   Tue, 11 Oct 2005 10:20:35 -0500

Kit Baum (baum@bc.edu) responded to my post about filename extensions:
> I understand why Stata might use this algorithm, but if I had  
> designed it, I would not have done it that way... "looking forward  
> for a period" fails miserably on any of my files with names like  
> directors.tenure.proxy.sep2005.dta, which are perfectly legal under  
> *nix variants. Searching BACKWARD from the end of the filename would  
> be a much better way to determine whether there is a file extension.  
> (That does not preclude Stata making a mistake with a file  
> lacking .dta, but then it is the user's problem, not Stata's).

I misspoke yesterday when I said that Stata searches from the
beginning of the filename.  For the purposes of determining
whether a file has an extension, it does not matter whether the
search starts at the beginning of the filename or at the end.
If there is a period anywhere in the filename, Stata will assume
the file has an extension.  Thus, if a user types

    . use directors.tenure.proxy.sep2005

Stata will assume that the extension is "sep2005" and will not try
to add ".dta".


Alan
(ariley@stata.com)
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