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Re: Undocumented array indexing feature? [message #14168 is a reply to message #14114]

Tue, 26 January 1999 00:00

R.Bauer
Messages: 1424
Registered: November 1998

Senior Member

wbiagiot@suffolk.lib.ny.us wrote:

> In article <36AC8341.EC8@rosa.mpin-koeln.mpg.de>,
> Alex Schuster <alex@rosa.mpin-koeln.mpg.de> wrote:
>> wrb1000@my-dejanews.com wrote:
>>
>>> This is veering offtopic, but I'd just like to add my two cents.
>>> IDL, like C, has many constructs that may add placed on a line to
>>> condense the actual length of the program. However, just like C, the
>>> readablity and understanding factors tend to drop. I intend to use the
>>> a=(b=(c=1)) example. I always wondered how to initialize multiple variables
>>> on the same IDL line.
>>
>> Now that's an easy one:
>>
>> IDL> a=1 & b=2 & c=3 & d=4 &
>>
>> Voila, one line :-)
>>
>> Alex
>
> Oh, I knew that one, Alex. Anyone know which method offers faster execution -
>
> a = 0 & b = 0 * OR * a = (b = 0)
>
> this is important when applying the same principle to large arrays. At least
> to those of us with slower PCs :(

Initializing of big arrays should be done by a=make_array(200,100000,/nozero)
This is the fastest method

R.Bauer

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[Message index]

		Undocumented array indexing feature? By: Liam Gumley on Thu, 21 January 1999 00:00
		Re: Undocumented array indexing feature? By: Martin Schultz on Tue, 26 January 1999 00:00
		Re: Undocumented array indexing feature? By: R.Bauer on Tue, 26 January 1999 00:00

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