comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » Re: brain twister

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

Re: brain twister [message #22800 is a reply to message #22797]

Fri, 08 December 2000 13:10

mole6e23
Messages: 31
Registered: December 1998

Member

Paul van Delst <pvandelst@ncep.noaa.gov> wrote:

>> Okay, enough ideology for one week.
>
> That's *almost* a pun. :o)

Wow, I missed that one. Getting slow, I guess.

>> ----- Example 2
>> .comp
>> function test2, x
>> return, x
>> end
>>
>> a = dindgen(5)
>> (test2(a))[2] = -2
>> print, a
>
> You're right...this is weird. If you do a help:
>
> IDL> help, test2(a)
> A DOUBLE = Array[5]
>
> How come the result isn't
>
> <Expression> DOUBLE = Array[5]

I wouldn't expect the result to be <Expression> becaues the result _is_ A,
so I would expect IDL to tell me that the result is A. We pass in a by
reference, return it, and so we should expect to get it back. I'm happy
that IDL can keep track of the variable through all that mucking around...
it makes sense to me.

Todd

Report message to a moderator

[Message index]

		Re: brain twister By: Paul van Delst on Fri, 08 December 2000 15:02
		Re: brain twister By: mole6e23 on Fri, 08 December 2000 13:10
		Re: brain twister By: Paul van Delst on Fri, 08 December 2000 11:37
		Re: brain twister By: Pavel A. Romashkin on Fri, 08 December 2000 09:59
		Re: brain twister By: mole6e23 on Fri, 08 December 2000 08:58

Previous Topic:	WNT environmental vars
Next Topic:	IDLWAVE 4.6

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 00:50:40 PDT 2025

Total time taken to generate the page: 1.52589 seconds