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Re: Checking version number [message #66825 is a reply to message #66824]

Fri, 12 June 2009 15:47

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

wlandsman wrote:
> On Jun 12, 5:28 pm, "Kenneth P. Bowman" <k-bow...@null.edu> wrote:
>> I don't like to write version-dependent code, but with the improved PS
>> driver in IDL 7.1 I would like to keep my old workarounds for 24-bit
>> color available.
>>
>> The quantity stored in !VERSION is a string
>>
>> IDL> help, !version.release
>> <Expression> STRING = '7.1'
>>
>> But this is not simple to convert to a number, because there are
>> instances like this
>>
>
> I have always found that just using a string comparison works fine
> (no need to convert to a number), even with subversions e.g.
>
> if !VERSION.RELEASE GE '7.1' THEN ...
>
> Of course this might begin to fail with Version 10... --Wayne

Or any minor version i.e. if we had made it to 6.10. Modern IDLs should
be OK, but how many minor versions were there in IDL 1, 2, 3, and 4?

IDL> print, '6.10' gt '6.2'
0

Mike
--
www.michaelgalloy.com
Associate Research Scientist
Tech-X Corporation

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[Message index]

		Re: Checking version number By: wlandsman on Fri, 12 June 2009 17:46
		Re: Checking version number By: Michael Galloy on Fri, 12 June 2009 16:14
		Re: Checking version number By: Michael Galloy on Fri, 12 June 2009 15:47
		Re: Checking version number By: David Fanning on Fri, 12 June 2009 15:07
		Re: Checking version number By: Kenneth P. Bowman on Fri, 12 June 2009 14:52
		Re: Checking version number By: David Fanning on Fri, 12 June 2009 15:03
		Re: Checking version number By: wlandsman on Fri, 12 June 2009 15:01
		Re: Checking version number By: R.G. Stockwell on Fri, 12 June 2009 14:52

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