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Re: Unsatisfactory 'file_test()' behavior [message #28434 is a reply to message #28433]

Mon, 17 December 2001 07:01

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Matt Feinstein (mfein@clark.net) writes:

> If I do
>
> e = file_test('')
>
> that is, test for the existence of a file whose name is a zero-length
> string, I get e = 1. This is not good ! (Using IDL v5.4 WinNT 4.0).

The reasons for this are obscure, but have to due
with the quantum properties of vacuums. It turns
out that you can never say that a particular
unit of space is "empty", since quantum fluctuations
cause physical elements to appear, however
briefly. IDL is frequently used to solve this
type of cutting-edge problem.

Cheers,

David

--
David W. Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Unsatisfactory 'file_test()' behavior By: Paul van Delst on Mon, 17 December 2001 07:23
		Re: Unsatisfactory 'file_test()' behavior By: David Fanning on Mon, 17 December 2001 07:01
		Re: Unsatisfactory 'file_test()' behavior By: Dick Jackson on Tue, 18 December 2001 08:09

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