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Re: NSIndexSet
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Re: NSIndexSet


  • Subject: Re: NSIndexSet
  • From: Greg Titus <email@hidden>
  • Date: Fri, 21 Nov 2008 08:00:14 -0800

On Nov 21, 2008, at 7:44 AM, David Blanton wrote:

How would one construct an NSIndexSet containing the indices 2,4,5 ?

I did:

	NSRange two = NSMakeRange(2, 1);
	NSRange four = NSMakeRange(4, 1);
	NSRange five = NSMakeRange(5, 1);
	NSRange u1 = NSUnionRange(two,four);
	NSRange u2 = NSUnionRange(u1,five);
	id indices = [NSIndexSet indexSetWithIndexesInRange:u2];
But, of course, NSUnionRange adds 3 so indices becomes 2,3,4,5.

Or, should one even use NSIndexSet?

The easiest way is to make a mutable index set:

NSMutableIndexSet *indices = [NSMutableIndexSet indexSet];
[indices addIndex:2];
[indices addIndex:4];
[indices addIndex:5];

Hope this helps,
	- Greg
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References: 
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 >Re: GetApplicationTextEncoding & "carbon free" (From: "Michael Ash" <email@hidden>)
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