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Re: Why won't this work!?

Subject: Re: Why won't this work!?
From: Mike Schrag <email@hidden>
Date: Wed, 24 Oct 2007 09:29:59 -0400
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Because NSArray has a custom implementation of valueForKey that tries to call whatever key you give it on the elements of the array ... For instance, "array.name" returns an array of the names of all the elements in the array. The only exceptions to this are @ operators and "count". What you want is WOConditional condition = downloads.count (negate = false).

ms

On Oct 24, 2007, at 9:19 AM, Miguel Arroz wrote:

Hi!
  Sometimes I really think I should change business!
  I have this binding:
ShowDowndloadsConditional: WOConditional {
	condition = downloads.isEmpty;
	negate = true;
}
  "downloads" is an NSArray.
  When running, I get this:
Reason: <my.top.secret.package.name.ExportDownloadItem 0xb95569> valueForKey (): lookup of unknown key: 'isEmpty'. This class does not have an instance variable of the name isEmpty or _isEmpty, nor a method of the name isEmpty, _isEmpty, getIsEmpty, or _getIsEmpty
  The ExportDownloadItem is an object in the array.
  My question is... why!?!?!? :)
If I do this the dull way (write a method that returns downloads.isEmpty() ) and bind to it, this works.
  Yours
Miguel Arroz
Miguel Arroz
http://www.terminalapp.net
http://www.ipragma.com
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References:
	>Why won't this work!? (From: Miguel Arroz <email@hidden>)

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