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From: Fabrice Le Fessant <fessant@pa.dec.com>
Message-ID: <14213.21064.503662.843704@langouste.pa.dec.com>
Date: Thu, 8 Jul 1999 18:37:12 -0700 (PDT)
To: knotwell@f5.com
Cc: Gerd.Stolpmann@darmstadt.netsurf.de, caml-list@inria.fr
Subject: Re: small code problem
References: <14205.15754.427409.474325@knotwell.f5.com>
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 > This is a serious question (not an argumentative one).  How do I avoid 
 > Invalid_argument when I'm expecting the user to enter a filename on
 > the command-line?  Or are you just talking in general?

You can check the size of the array before reading it:

if Array.length Sys.argv < 2 then usage ();;
let filename = Sys.argv.(1)

will never raise an Invalid_argument exception.

- Fabrice

Homepage: http://pauillac.inria.fr/~lefessan