Mike wrote:
> 1) If I have an object - how do I create an array of objects with it ?
> for example
>
> chicken: make object! [
> tasty: "wings"
> ]
>
> now I would want to have an array of objects of that type.
>> help array
USAGE:
ARRAY size /initial value
DESCRIPTION:
Makes and initializes a series of a given size.
ARRAY is a function value.
ARGUMENTS:
size -- Size or block of sizes for each dimension (Type: integer block)
REFINEMENTS:
/initial -- Specify an initial value for all elements
value -- Initial value (Type: any)
>> chicken: make object! [
[ tasty: "wings"
[ ]
>> chickenfarm: array/initial 10 chicken
== [
make object! [
tasty: "wings"
]
make object! [
tasty: "wings"
]
make object! [
t...
> 2) How do you create custom types ?
> I am talking of a way to emulate the typedef behavour in C ?
Not yet directly available in Rebol. :(
> How would you go to create an "enum" type in REBOL ?
Several ways:
>> foo: func [/bar /baz] [probe bar probe baz]
>> foo/bar
true
none
== none
>> foo/bar/baz
true
true
== true
>> MyEnum: [Upper Lower Inbetween]
== [Upper Lower Inbetween]
>> index? find MyEnum 'Lower
== 2
Usually though, you'll find that there's not much need for enums in Rebol.
:)
> 3) Back on objects:
> objects seem to be pretty neat in REBOL - but I didn't find anything about
implementing and using constructor/destructors ?
>
> I know I could manually add a function that serves as constructor each
time I create an object, but is that the way REBOL requires it ?
Here's a constructor:
>> chicken: make object! [
[ tasty: "wings"
[ ]
Looks like you've found it all ready! :)
There's no need for a destructor in Rebol.
> 4) In the same context:
> how do I actually 'free' memory/variables ?
>> x: "A really large string! :)"
== "A really large string! :)"
>> x: none
== none
>> probe x
none
== none
More later.
Andrew J Martin
Speaking in tongues and performing miracles.
ICQ: 26227169
http://www.rebol.it/Valley/
http://valley.orcon.net.nz/
http://Valley.150m.com/
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