| Re: IDL Array Push [message #70323] |
Tue, 06 April 2010 03:52  |
Jeremy Bailin
Messages: 618
Registered: April 2008
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Senior Member |
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On Apr 5, 1:36 pm, Aram Panasenco <panasencoa...@gmail.com> wrote:
> On Apr 5, 9:23 am, James <donje...@gmail.com> wrote:
>
>> How is this different from concatenating two arrays like [[[array1]],
>> [[array2]]]?
>
> *facedesk*
>
> It's not. I completely forgot about concatenating arrays. Oh well, I
> suppose it was good coding practice anyway.
In my version of PUSH, it concatenates the two arrays if they exist,
but creates the first one with the contents of the second if it
doesn't. That makes it easy to stick into a loop where you don't know
whether the original array will exist at entry (or if you explicitly
know that it won't).
-Jeremy.
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| Re: IDL Array Push [message #70417 is a reply to message #70323] |
Tue, 06 April 2010 11:23  |
Aram Panasenco
Messages: 41
Registered: April 2010
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Member |
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On Apr 6, 3:52 am, Jeremy Bailin <astroco...@gmail.com> wrote:
> On Apr 5, 1:36 pm, Aram Panasenco <panasencoa...@gmail.com> wrote:
>
>> On Apr 5, 9:23 am, James <donje...@gmail.com> wrote:
>
>>> How is this different from concatenating two arrays like [[[array1]],
>>> [[array2]]]?
>
>> *facedesk*
>
>> It's not. I completely forgot about concatenating arrays. Oh well, I
>> suppose it was good coding practice anyway.
>
> In my version of PUSH, it concatenates the two arrays if they exist,
> but creates the first one with the contents of the second if it
> doesn't. That makes it easy to stick into a loop where you don't know
> whether the original array will exist at entry (or if you explicitly
> know that it won't).
>
> -Jeremy.
Wow, that's a great idea! It makes my code looks so much cleaner.
Compare:
polyPts = vertices[0:1,0]
polyPts = [[polyPts],[cartPts1]]
polyPts = [[polyPts],[vertices[0:1,1]]]
and
push, polyPts, vertices[0:1,0]
push, polyPts, cartPts1
push, polyPts, vertices[0:1,1]
Here's the new code: http://idl.pastebin.com/B0gm95pW
~Aram Panasenco
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