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Re: IDL Windows Question [message #77069]

Tue, 02 August 2011 04:29

Wout De Nolf
Messages: 194
Registered: October 2008

Senior Member

On Mon, 1 Aug 2011 12:07:04 -0600, David Fanning <news@idlcoyote.com>
wrote:

> This is Windows 7 with all updates running IDL 7.1.
> Any ideas about this?

A file has three different timestamps
1. File-Create time
2. Last-Modify (Last-Write) time
3. Last-Access time

From the examples below you see that the timestamps get updated
(marked with *) as you would expect:

A. Create a new PNG file
write_png,'c:\testimage.png',bytarr(200,200)
1. dinsdag 2 augustus 2011, 13:19:52
2. dinsdag 2 augustus 2011, 13:19:52
3. dinsdag 2 augustus 2011, 13:19:52

B. Create a PNG file with the same name
write_png,'c:\testimage.png',bytarr(200,200)
1. dinsdag 2 augustus 2011, 13:19:52
2. dinsdag 2 augustus 2011, 13:20:11 (*)
3. dinsdag 2 augustus 2011, 13:20:11 (*)

C. Create a new PNG file
write_png,'c:\image.png',bytarr(200,200)
1. dinsdag 2 augustus 2011, 13:12:52
2. dinsdag 2 augustus 2011, 13:12:52
3. dinsdag 2 augustus 2011, 13:12:52

D. Copy the file
file_copy,'c:\image.png','c:\image2.png'
1. dinsdag 2 augustus 2011, 13:15:35 (*)
2. dinsdag 2 augustus 2011, 13:12:52
3. dinsdag 2 augustus 2011, 13:15:35 (*)
(image.png timestamps not changed)

E. Move the file
file_move,'c:\image2.png','c:\image3.png'
1. dinsdag 2 augustus 2011, 13:15:35
2. dinsdag 2 augustus 2011, 13:12:52
3. dinsdag 2 augustus 2011, 13:16:49 (*)

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[Message index]

		Re: IDL Windows Question By: Wout De Nolf on Tue, 02 August 2011 04:29
		Re: IDL Windows Question By: David Fanning on Mon, 01 August 2011 14:17
		Re: IDL Windows Question By: Kenneth P. Bowman on Mon, 01 August 2011 13:46
		Re: IDL Windows Question By: Scott[1] on Tue, 02 August 2011 12:39

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