| Re: strictarrsubs in IDL 8.1 [message #84299] |
Fri, 17 May 2013 16:17  |
kdpenner
Messages: 6
Registered: May 2013
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Junior Member |
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On Friday, May 17, 2013 3:50:39 PM UTC-7, kdpe...@gmail.com wrote:
> Hi,
>
>
>
> I have the following in my .idlstartup:
>
>
>
> compile_opt strictarrsubs
>
>
>
Grr. WHERE returns an array when the condition is met, and when it's not, it returns -1 as an integer. strictarrsubs only catches bad subscripts when passed in arrays, not integers.
How unpleasant.
> However, I can subscript arrays in 8.1 with [-1], for instance. If I remember correctly, the compile_opt statement in earlier versions of IDL meant I would get an error for a [-1] subscript. Am I misremembering, or has something changed?
>
>
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> Thanks,
>
>
>
> Kyle
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| Re: strictarrsubs in IDL 8.1 [message #84533 is a reply to message #84299] |
Mon, 20 May 2013 08:30  |
Jeremy Bailin
Messages: 618
Registered: April 2008
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Senior Member |
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On 5/17/13 7:17 PM, kdpenner@gmail.com wrote:
> On Friday, May 17, 2013 3:50:39 PM UTC-7, kdpe...@gmail.com wrote:
>> Hi,
>>
>>
>>
>> I have the following in my .idlstartup:
>>
>>
>>
>> compile_opt strictarrsubs
>>
>>
>>
> Grr. WHERE returns an array when the condition is met, and when it's not, it returns -1 as an integer. strictarrsubs only catches bad subscripts when passed in arrays, not integers.
>
> How unpleasant.
>
>> However, I can subscript arrays in 8.1 with [-1], for instance. If I remember correctly, the compile_opt statement in earlier versions of IDL meant I would get an error for a [-1] subscript. Am I misremembering, or has something changed?
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Kyle
>
That's because for-reasons-that-still-baffle-me, subscripting with a
scalar negative index has a new legitimate meaning in IDL8 (counting
from the end instead).
-Jeremy.
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