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Re: Testing validity of numerical content of a string [message #51743 is a reply to message #51742]

Wed, 06 December 2006 17:38

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Y.T. writes:

> Maybe this is a stupid question, but is there a way in IDL to tell
> whether a string contains a valid representation of a particular data
> type? For example an integer? I can do something like
>
> test = fix(str)
>
> which will return zero (and throw an error message) if str is, say,
> "hello". But is there a way to tell whether type conversion of a string
> will work if attempted?
>
> Anybody have something clever at hand?

Clever's not really my thing. You would have to go to JD
for that. But FSC_FIELD has a neat little function named
"VALIDATE" that validates whether a string is a float or
double or an integer, whatever it is suppose to be. You
might be able to steal that and do something clever with
it. :-)

http://www.dfanning.com/programs/fsc_field.pro

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Testing validity of numerical content of a string By: Brian Larsen on Wed, 06 December 2006 17:49
		Re: Testing validity of numerical content of a string By: David Fanning on Wed, 06 December 2006 17:38
		Re: Testing validity of numerical content of a string By: Brian Larsen on Wed, 06 December 2006 18:50

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