Re: [Pyobjc-dev] DictType -> ObjC

[Ronald O. <ous...@ci...>]

On Thursday, Oct 17, 2002, at 22:58 Europe/Amsterdam, Bill Bumgarner 
wrote:

> On Thursday, October 17, 2002, at 04:32 PM, Jack Jansen wrote:
>> On donderdag, oktober 17, 2002, at 01:12 , Bill Bumgarner wrote:
>>>     How hard would it be to proxy DictType, ArrayType, and TupleType 
>>> into Obj-C such that they look/feel/act/behave/are subclasses of 
>>> NSDictionary and NSArray?
>>
>> Will these objects still be compatible with CoreFoundation? I'm not 
>> familiar enough with how Apple made CF and NS objects 
>> interchangeable, but if Pyobjc would handle most objects not by 
>> actually converting them but by putting them in something that merely 
>> "looks/feels/acts/behaves" like the real NS class that may not be 
>> good enough. I assume that "are" is good enough, but again I'm not 
>> sure.
>
> Yes -- it is simply a matter of implementing the appropriate primitive 
> methods for each class [for class clusters]:
[removed example]

Great. Actually adding these collection proxies is fairly trivial.

With a just commited version of python:
from Foundation import NSMutableArray

a = NSMutableArray.alloc().init()
a.addObject_(1)
a.addObject_({'hello':'world'})
a.addObject_([3, 4, 5])
print "The array:", type(a), a
print "a[0]:", type(a[0]), `a[0]`
print "a[1]:", type(a[1]), `a[1]`
print "a[2]:", type(a[2]), `a[2]`

Gives:

The array: <objective-c class NSCFArray at 0x30ed70> (1, {hello = 
world; }, (3, 4, 5))
a[0]: <objective-c class NSCFNumber at 0x2d7550> 1
a[1]: <type 'dict'> {'hello': 'world'}
a[2]: <type 'list'> [3, 4, 5]


Note that a[1] and a[2] are printed like NSDictionary and NSArray 
objects while in the NSMutableArray.

Ronald