Sorry, yes I see now!! Will try that out and let you know!
Sent from my iPhone
> On 07 Mar 2015, at 13:43, Ken Thomases <k...@codeweavers.com> wrote:
>
> On Mar 7, 2015, at 6:34 AM, Diederik Meijer <diede...@tenhorses.com> wrote:
>
>>> On 07 Mar 2015, at 12:36, Ken Thomases <k...@codeweavers.com> wrote:
>>>
>>>> On Mar 7, 2015, at 5:02 AM, Diederik Meijer <diede...@tenhorses.com> wrote:
>>>>
>>>> This is part of XML parsing with NSXMLParser, is there any way to avoid
>>>> this type of staircasing by constructing a keyPath dynamically?
>>>>
>>>> if (self.nestingLevel == 1) { [[[self.rootparser nodeTree]
>>>> lastObject][@"items"] addObject:dict]; }
>>>> if (self.nestingLevel == 2) { [[[[self.rootparser nodeTree]
>>>> lastObject][@"items"] lastObject][@"items"] addObject:dict]; }
>>>> if (self.nestingLevel == 3) { [[[[[self.rootparser nodeTree]
>>>> lastObject][@"items"] lastObject][@"items"] lastObject][@"items"]
>>>> addObject:dict]; }
>>>> if (self.nestingLevel == 4) { [[[[[[self.rootparser nodeTree]
>>>> lastObject][@"items"] lastObject][@"items"] lastObject][@"items"]
>>>> lastObject][@"items"] addObject:dict]; }
>>>>
>>>> As you can see the action is always the same: addObject:dict
>>>>
>>>> But depending on the level of nesting, lastObject][@"items”] needs to be
>>>> added multiple times to the self.rootparser’s nodeTree property.
>>>>
>>>> Is there any way to use a loop that runs for self.nestingLevel times and
>>>> adds the extra levels to the keyPath just as many times as needed and then
>>>> use that to access the noteTree at the exact right level?
>>>
>>> No. Key paths can't index into arrays. However, you can just use a simply
>>> for loop. Something like:
>>>
>>> NSMutableArray* array = [[self.rootparser nodeTree] lastObject][@"items"];
>>> for (int i = 1; i < self.nestingLevel; i++)
>>> array = array.lastObject[@"items"];
>>> [array addObject:dict];
>
>>
>> Thanks Ken, but this does not seem to traverse down into n nested levels,
>> correct?
>
> It does traverse down. It's just like your code, except generalized.
>
>> The loop goes through the nodeTree's first level children only (pardon the
>> bad semantics here)
>
> Each time through the loop, it reassigns the "array" variable. So, the next
> time through the loop, it's accessing a deeper level of the tree.
>
> Regards,
> Ken
>
>
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