Re: [chuck-users] determining the type of an Object in code

Dan, On Thu, Sep 4, 2008 at 11:51 PM, Dan Zinkevich wrote:

I haven't gotten around the typing issue yet, I'm working exclusively w/ floats, since they're relatively simple to convert to ints and durs.

That's true, I hadn't thought about that. Similarly, I'm working with one datatype: an object that is supposed to contain the data necessary to play a grain in granular synthesis. I have a limited set of grain-types worked out and I'm trying to built higher and higher levels of semantics to describe them. I'm leaning heavily on arrays for this. Or that's my plan, anyway. To be honest, so far I'm just going through SuperCollider documentation and stealing ideas for methods... ;-)

I started out w/ ChucK and put together a pretty reusable class this past weekend, that includes all your standard add/subtract/merge/pop/no dups, etc, as well as a few different sorting algos (up/down/converge/diverge/random for now), with the long-term idea to create a flexible sequencer or arpeggiator. It would be great to apply these to a collection-like superclass, so I was hoping any headway (if any) could be shared before I get too married to floats.

That sounds really helpful, actually. One thing I learned from the SC docs on their Collection class was that they have borrowed a bunch of tricks from functional programming that, in the context of arrays, might make it a bit more worth while to use functors in Chuck. A lot of their Collection methods take functions as parameters and iterate the function with the array values as inputs to the functions and return the results as an array or collect them as a single item. This might be very helpful in the case of floats, since you could encapsulate a lot of mathematical operations as functors and save on all that "for( 0 = int i; i < ... " business.

Is the ChucK wiki the best place to post it for collaboration?

Sounds like as good a place as any. -Mike

DFZ

mike clemow wrote:

...

Hi Daniel,

I personally believe that it's in the best interest of the Chuck community if this discussion stays on-list. I hope that's okay with you--I'm not trying to step on anyone's privacy here. How exactly are you getting around the typing issue?

Cheers, Mike

On Wed, Sep 3, 2008 at 6:50 PM, Daniel Zinkevich wrote:

...

Hi list,

New here, and to ChucK in general, but I'm also working on a similar collection class. Don't want to step on anyone's toes, Mike, let's talk dzinkevich@gmail.com

DFZ

On Wed, Sep 3, 2008 at 6:29 PM, mike clemow wrote:

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I wanted to write a class that would abstract arrays like the Collection class in SuperCollider. I guess I can't. I would have to write a class for each type of object that I wanted to make Collections of.

-Mike

On Wed, Sep 3, 2008 at 5:17 PM, Kassen wrote:

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2008/9/3 mike clemow

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Hi list,

Is there a way to determine an object's type programmatically?

I don't think so, I thought for a moment that we could write a massively overloaded function but then remembered arrays are separate types and

int foo[ ];

is a different type from

int bar[ ] [ ];

So we'd need a infinitely overloaded function...

I'm not sure why you could need this. I'm not sure in what kind of situation you would get a object from somewhere yet be unaware of it's type; because of our strong typing I don't think we ever get such objects (which can be nice yet is related to limitations as well).

Could you illustrate the issue?

Yours, Kas.

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