Re: [chuck-users] functions returning arrays

Great - thanks! Yours truly, David On 2012-02-23, at 3:59 PM, mike clemow wrote:

Alternatively, you can implement this will the append operator:

fun float[] t(float x,float nn[]) {

// assign with zero length float rr[0];

for(0 => int n;n

<<< t(4.5, [7.,8.,9.])[2] >>>; // should print 13.5

http://michaelclemow.com http://semiotech.org

On Thu, Feb 23, 2012 at 3:56 PM, mike clemow wrote:

...

Yes, ditto to what Kassen said. (I'm too slow... ;)

fun float[] t(float x,float nn[]) {

float rr[nn.size()];

for(0 => int n;n

nn[n] + x => rr[n];

}

return rr;

}

<<< t(4.5, [7.,8.,9.])[2] >>>; // should print 13.5

http://michaelclemow.com http://semiotech.org

On Thu, Feb 23, 2012 at 3:45 PM, Kassen wrote:

...

On Thu, Feb 23, 2012 at 12:27:22PM -0800, Colin Sullivan wrote:

...

David,

I think the problem may be that you are returning an array that is local to your function and it is getting deallocated when the function returns.

That's what I thought too, and that certainly can happen. In that case a extra assignment (using @) can increase the reference count, tricking the simple CC. That's not "good form" just a workaround while some of that stuff is a bit dodgy.

That's not the issue here though, at least not the primary one. The primary issue here is that rr gets defined without a length and so apparently doesn't get initiated. Editing the relevant line to read;

float rr[nn.size()];

makes sure all floats are initiated and for my tests it works.

I think the issue is not with returning, the reported error is refering -I suspect- to the moment when we try to chuck the result of the addition to the array location, the error just isn't indicating that, obfuscating what went wrong.

I hope that helps (I also hope it's correct ;-) )

Yours, Kas.

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