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Re: DLM heap variable access [message #67148 is a reply to message #66984]

Mon, 06 July 2009 05:16

Jason Ferrara
Messages: 17
Registered: February 2008

Junior Member

On Jun 27, 3:34 pm, pp <pp.pente...@gmail.com> wrote:
> I got tired of waiting for the ITTVIS folks to implement some more
> data structures in IDL. Coding a bunch of them (lists, maps, stacks)
> in IDL would be a fair amount of rewriting the wheel, and also
> inefficient, because of the way IDL' s pointers and scalars work. So I
> decided that the nicest solution would be to have IDL objects as
> wrappers to C++ containers. It is simple enough to do it writing a DLM
> in the way Ronn Kling' s book suggests, with the IDL object containing
> a (real) pointer to the C++ object, and wrapper methods to call the C+
> + methods.

With Slither you can use Python's container classes from IDL. I
realize its a bit extreme to use a method that requires a Python
install plus a Slither license just to get some containers, but it
does work rather well.

IDL> pb=pyimport("__builtin__")
% Loaded DLM: SLITHER.
IDL> l=pb->list()
IDL> l->append, 6
IDL> l->append, 3
IDL> l->append, 23
IDL> print, pb->len(l)
3
IDL> print, l->__getitem__(1)
3
IDL> print, l->__getitem__(0)
6
IDL> print, l->__getslice__(1,3)
3 23
IDL> print, pytoidl(l)
6 3 23
IDL> print, l->pop()
23
IDL> print, l->pop()
3
IDL>
IDL>
IDL>
IDL> d=pb->dict()
IDL> d->__setitem__, "something",2
IDL> d->__setitem__, "otherthing",3
IDL> d->__setitem__, "nothing",6
IDL> print, d->__getitem__("otherthing")
3
IDL> print, d->keys()
nothing otherthing something
IDL> print, d->values()
6 3 2

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[Message index]

		DLM heap variable access By: penteado on Sat, 27 June 2009 12:34
		Re: DLM heap variable access By: Jason Ferrara on Mon, 06 July 2009 05:16
		Re: DLM heap variable access By: penteado on Fri, 03 July 2009 08:46
		Re: DLM heap variable access By: penteado on Sat, 11 July 2009 10:45
		Re: DLM heap variable access By: penteado on Thu, 02 July 2009 19:41
		Re: DLM heap variable access By: Michael Galloy on Thu, 02 July 2009 15:57
		Re: DLM heap variable access By: penteado on Thu, 02 July 2009 13:44
		Re: DLM heap variable access By: rtk on Mon, 13 July 2009 14:40
		Re: DLM heap variable access By: rtk on Mon, 13 July 2009 09:05

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