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how do you resize an object array?

Perry R Cook

2 Feb 2014 2 Feb '14

4:24 p.m.

5. how do you resize an object array? (George Locke) Here's something that should be useful. (from the .pdf ChucK Manual, under Dynamic Arrays, there's more there about it) [64, 65, 60, 59] @=> int notes[]; notes << 58; // notes is [64, 65, 60, 59, 58] notes << 60; // notes is [64, 65, 60, 59, 58, 60] notes.popBack(); // [64, 65, 60, 59, 58] notes << 64 << 65 << 60; // [64, 65, 60, 59, 58, 64, 65, 60]

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George Locke

2 Feb 2 Feb

4:54 p.m.

New subject: Dynamic Arrays (George Locke)

that works. i'm surprised that the .size method doesn't work, tho, since it does work on primitive type arrays. I guess there's no instantiation happening or something... Thanks! - George On Sun, Feb 2, 2014 at 4:24 PM, Perry R Cook wrote:

5. how do you resize an object array? (George Locke)

Here's something that should be useful. (from the .pdf ChucK Manual, under Dynamic Arrays, there's more there about it)

[64, 65, 60, 59] @=> int notes[];

notes << 58; // notes is [64, 65, 60, 59, 58] notes << 60; // notes is [64, 65, 60, 59, 58, 60]

notes.popBack(); // [64, 65, 60, 59, 58]

notes << 64 << 65 << 60; // [64, 65, 60, 59, 58, 64, 65, 60]

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Stefan Blixt

5:27 p.m.

New subject: Dynamic Arrays (George Locke)

My guess is that it inserts null pointers into the array as you expand it, which doesn't feel totally unreasonable. For primitives there's usually intuitive default value that the compiler can use, with objects (that need allocated resources for their instances, which could be either the declared type or a subclass), null is the logical default. On Sun, Feb 2, 2014 at 10:54 PM, George Locke

wrote:

that works. i'm surprised that the .size method doesn't work, tho, since it does work on primitive type arrays. I guess there's no instantiation happening or something...

Thanks!

- George

On Sun, Feb 2, 2014 at 4:24 PM, Perry R Cook wrote:

...
5. how do you resize an object array? (George Locke)

Here's something that should be useful. (from the .pdf ChucK Manual, under Dynamic Arrays, there's more there about it)

[64, 65, 60, 59] @=> int notes[];

notes << 58; // notes is [64, 65, 60, 59, 58] notes << 60; // notes is [64, 65, 60, 59, 58, 60]

notes.popBack(); // [64, 65, 60, 59, 58]

notes << 64 << 65 << 60; // [64, 65, 60, 59, 58, 64, 65, 60]

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George Locke

3 Feb 3 Feb

12:12 p.m.

New subject: Dynamic Arrays (George Locke)

I was getting a bit frustrated, but it is definitely possible to get this to work properly. I had code that did something like ar.size(siz); for (0 => int i; i < siz; i++) { SinOsc s; s => ar[i]; } which didn't work, but changing it to "s @=> ar[i]" *did* work, which makes sense, since the interpreter/compiler might reasonably think I was chucking something to ar[i], a null pointer. I think my grumbling may have been a bit premature in this case. Thanks for all the help! - George On Sun, Feb 2, 2014 at 5:27 PM, Stefan Blixt wrote:

My guess is that it inserts null pointers into the array as you expand it, which doesn't feel totally unreasonable. For primitives there's usually intuitive default value that the compiler can use, with objects (that need allocated resources for their instances, which could be either the declared type or a subclass), null is the logical default.

On Sun, Feb 2, 2014 at 10:54 PM, George Locke < george.locke.maxmsp@gmail.com> wrote:

...
that works. i'm surprised that the .size method doesn't work, tho, since it does work on primitive type arrays. I guess there's no instantiation happening or something...

Thanks!

- George

On Sun, Feb 2, 2014 at 4:24 PM, Perry R Cook wrote:

...
5. how do you resize an object array? (George Locke)

Here's something that should be useful. (from the .pdf ChucK Manual, under Dynamic Arrays, there's more there about it)

[64, 65, 60, 59] @=> int notes[];

notes << 58; // notes is [64, 65, 60, 59, 58] notes << 60; // notes is [64, 65, 60, 59, 58, 60]

notes.popBack(); // [64, 65, 60, 59, 58]

notes << 64 << 65 << 60; // [64, 65, 60, 59, 58, 64, 65, 60]

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George Locke
Perry R Cook
Stefan Blixt