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rangeOfString behaves wierd
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rangeOfString behaves wierd


  • Subject: rangeOfString behaves wierd
  • From: "Gerriet M. Denkmann" <email@hidden>
  • Date: Mon, 09 Dec 2013 14:46:27 +0700

In 10.9.0, Xcode 5.0.2 I added these lines to applicationDidFinishLaunching:

NSString *a = @"见=見見";	//	0x89c1 	0x3d 	0xfa0a	0x898b
NSString *b = @"见≠見";		//	0x89c1 	0x2260	0x898b
NSRange aRange = [ a rangeOfString: b ];
NSLog(@"%s \"%@\" (%lu shorts) occurs in \"%@\" (%lu shorts) at %@",__FUNCTION__,
		b, [b length], a, [a length], NSStringFromRange(aRange));

And was told:
"见≠見" (3 shorts) occurs in "见=見見" (4 shorts) at {0, 4}

This comes somewhat unexpected.

What am I doing wrong?

Or are my expectations false?
I would (maybe naively) expect that the shorter string could at most occur at {0,3}.
I would also expect that ≠ is NOT quite the same as =.
But then, I was wrong before.

Gerriet.


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