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Re: Dos and Donts [message #21963 is a reply to message #21923]

Tue, 03 October 2000 00:00

pit
Messages: 92
Registered: January 1996

Member

brinks <h.j.brinksmeyer@physik.uni-marburg.de> writes:

>> The argument a[0:63, 0:63] is passed to TEMPORARY by value, and
>> therefore cannot be modified. However the following method *does* save
>> memory:
>>
>> a = dist(256)
>> b = (temporary(a))[0:63, 0:63]
>> help, a, b
>> A UNDEFINED = <Undefined>
>> B FLOAT = Array[64, 64]
>
> Finally, that's something new, I didn't know before!!!
> Thank you very much :-)

But exactly as one should expect.

Concerning temporary:
Be carefull in tight memory situations.
If you *do* run out of memory in a
a = f(temporary(a))
statement, then a is lost as in the example above!

Peter

--
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Dr. Peter "Pit" Suetterlin http://www.astro.uu.nl/~suetter
Sterrenkundig Instituut Utrecht
Tel.: +31 (0)30 253 5225 P.Suetterlin@astro.uu.nl
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		Dos and Donts By: Hans J�rg Brinksmey on Wed, 27 September 2000 00:00
		Re: Dos and Donts By: pit on Tue, 03 October 2000 00:00

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