[MacRuby-devel] How to use NSIndexSet with tableView data

[Eloy Duran]

You’re right, I forgot to include the line that basically did: @items
-= fish. However, since an array is actually of the mutable type
NSMutableArray, you can use its API as well http://bit.ly/90436W.

irb(main):007:0> a.removeObjectsAtIndexes(indices)
=> ["apple", "orange"]

If you find you need to work with NSIndexSet's a lot, you could go to
town and add this to NSIndexSet: http://gist.github.com/642166

HTH,
Eloy

On Sat, Oct 23, 2010 at 2:14 PM, Pixoo <madpixoo at gmail.com> wrote:
> That doesn't match what I need.
> Ok, here is what I have :
>
> My data is the @items variable which is an array of objects.
> My tableView is @tableView.
> The action is a reaction to a click on a remove button after a selection in
> the table.
>
> What I want to do is something like this :
>
> def removeItems(sender)
>   indexes = @tableView.selectedRowsIndexes
>   @items.delete_at(indexes)
>   @tableView.reloadData
> end
>
> But I can't get a way to make it work.
>
> On Sat, Oct 23, 2010 at 2:03 PM, Eloy Duran <eloy.de.enige at gmail.com> wrote:
>>
>> Since an Array is a NSArray: http://bit.ly/de3kxd, maybe something
>> like the following?
>>
>> $ macirb
>> irb(main):001:0> a = ['apple', 'tuna', 'orange']
>> => ["apple", "tuna", "orange"]
>> irb(main):002:0> indices = NSIndexSet.indexSetWithIndex(1)
>> => #<NSIndexSet:0x20023fe80>
>> irb(main):003:0> fish = a.objectsAtIndexes(indices)
>> => ["tuna"]
>>
>> Eloy
>>
>> On Sat, Oct 23, 2010 at 1:18 PM, Pixoo <madpixoo at gmail.com> wrote:
>> > Hi !
>> >
>> > I'm trying to use a tableView with MacRuby.
>> > What I want to do is remove items from my data array based on the
>> > tableView
>> > selection.
>> >
>> > I used @tableView.selectedRowsIndexes but it returns a NSIndexSet and I
>> > don't know how to use it with my array.
>> > Can you give me some leads on the subject ?
>> >
>> > Thanks,
>> >
>> > _______________________________________________
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>> > MacRuby-devel at lists.macosforge.org
>> > http://lists.macosforge.org/mailman/listinfo.cgi/macruby-devel
>> >
>> >
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>
>
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