comp.lang.idl-pvwave archive: archive » Re: Strange arrary indexing quirk?

Home » Public Forums » archive » Re: Strange arrary indexing quirk?

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Strange arrary indexing quirk? [message #77180 is a reply to message #77179]

Thu, 11 August 2011 20:45

penteado
Messages: 866
Registered: February 2018

Senior Member
Administrator

On Aug 11, 10:12 pm, Beaker <mattjamesfran...@gmail.com> wrote:
> Does anyone have any insight into why this happens? I'd expect the
> second line to also throw an error. A lot of the inner workings of IDL
> seem pretty arcane and hard to guess at before you try things...

It happens because it was chosen that way when the language was
defined. Quoting from the help:

"STRICTARRSUBS — When IDL subscripts one array using another array as
the source of array indices, the default behavior is to clip any out-
of-range indices into range and then quietly use the resulting data
without error. This behavior is described in Understanding Array
Subscripts. Specifying STRICTARRSUBS will instead cause IDL to treat
such out-of-range array subscripts within the body of the routine
containing the COMPILE_OPT statement as an error. The position of the
STRICTARRSUBS option within the module is not important: All
subscripting operations within the entire body of the specified
routine will be treated this way."

Report message to a moderator

[Message index]

		Re: Strange arrary indexing quirk? By: Matt Francis on Thu, 11 August 2011 22:05
		Re: Strange arrary indexing quirk? By: David Fanning on Thu, 11 August 2011 20:58
		Re: Strange arrary indexing quirk? By: penteado on Thu, 11 August 2011 20:45
		Re: Strange arrary indexing quirk? By: penteado on Thu, 11 August 2011 20:42

Previous Topic:	Strange arrary indexing quirk?
Next Topic:	iPlot Axes Colour

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Wed Oct 08 15:55:46 PDT 2025

Total time taken to generate the page: 0.00478 seconds