NSPredicate like NSLiteralSearch

2009-12-15 Thread Gerriet M. Denkmann 

This works. i.e. returns {0,1}:
NSRange r2 = [ @ก่ี rangeOfString: @ก options: NSAnchoredSearch | 
NSLiteralSearch ];
(without NSLiteralSearch it returns NSNotFound).

but an NSPredicate with: someProperty BEGINSWITH ก  does NOT find ก่ี.
(the NSPredicate is to be used with -[NSArrayController setFilterPredicate:] to 
query Core Data).

So: is there some string_option equivalent to NSLiteralSearch?

And a related question: where are the available string_options defined?
The Predicate Programming Guide has:
string_options ::= c | d | cd

but also an example with w:
((* = FooBar*wcd)) || (kMDItemTextContent = FooBar*cd))

10.6.2

Kind regards,

Gerriet.

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Re: NSPredicate like NSLiteralSearch

2009-12-15 Thread Jim Turner 
I believe you need the diacritic insensitive option:

'someProperty BEGINSWITH[d] ?'

Look up NSComparisonPredicate options in the documentation for more
discussion.  As for what the 'w' means, it's Spotlight specific.  The
Comparison is word based, and also detects transitions from lower-case
to upper-case.

http://developer.apple.com/Mac/library/documentation/Carbon/Conceptual/SpotlightQuery/Concepts/QueryFormat.html

-- 
Jim
http://nukethemfromorbit.com



On Tue, Dec 15, 2009 at 1:30 AM, Gerriet M. Denkmann
gerr...@mdenkmann.de wrote:

 This works. i.e. returns {0,1}:
 NSRange r2 = [ @??? rangeOfString: @? options: NSAnchoredSearch | 
 NSLiteralSearch ];
 (without NSLiteralSearch it returns NSNotFound).

 but an NSPredicate with: someProperty BEGINSWITH ?  does NOT find ???.
 (the NSPredicate is to be used with -[NSArrayController setFilterPredicate:] 
 to query Core Data).

 So: is there some string_option equivalent to NSLiteralSearch?

 And a related question: where are the available string_options defined?
 The Predicate Programming Guide has:
 string_options ::= c | d | cd

 but also an example with w:
 ((* = FooBar*wcd)) || (kMDItemTextContent = FooBar*cd))

 10.6.2

 Kind regards,

 Gerriet.

 ___

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Re: NSPredicate like NSLiteralSearch

2009-12-15 Thread Gerriet M. Denkmann 

On 15 Dec 2009, at 23:13, Jim Turner wrote:

 I believe you need the diacritic insensitive option:
 
 'someProperty BEGINSWITH[d] ก'

Well, no. BEGINSWITH[d] tells me that กิน begins with กุ - that is: it 
ignores not only the tone-marks, but also some vowels, which makes it quite 
unusable for Thai text.

MATCHES can be used (it seems to act like NSLiteralSearch) but it is quite slow.
 
 Look up NSComparisonPredicate options in the documentation for more
 discussion.  

NSComparisonPredicate Class Reference mentions under NSComparisonPredicate 
Options the [n] modifier.

I just tried it: BEGINSWITH[n] finds that กิน begins with ก - same as 
NSLiteralSearch.
But CONTAINS[n] does not work like NSLiteralSearch.

 As for what the 'w' means, it's Spotlight specific.  The
 Comparison is word based, and also detects transitions from lower-case
 to upper-case.
 
 http://developer.apple.com/Mac/library/documentation/Carbon/Conceptual/SpotlightQuery/Concepts/QueryFormat.html
 

Somehow I have the feeling that the documention for NSPredicates has some room 
for improvements.

Thanks very much for your links!

Gerriet.


 -- 
 Jim
 http://nukethemfromorbit.com
 
 
 
 On Tue, Dec 15, 2009 at 1:30 AM, Gerriet M. Denkmann
 gerr...@mdenkmann.de wrote:
 
 This works. i.e. returns {0,1}:
 NSRange r2 = [ @ก่ี rangeOfString: @ก options: NSAnchoredSearch | 
 NSLiteralSearch ];
 (without NSLiteralSearch it returns NSNotFound).
 
 but an NSPredicate with: someProperty BEGINSWITH ก  does NOT find ก่ี.
 (the NSPredicate is to be used with -[NSArrayController setFilterPredicate:] 
 to query Core Data).
 
 So: is there some string_option equivalent to NSLiteralSearch?
 
 And a related question: where are the available string_options defined?
 The Predicate Programming Guide has:
 string_options ::= c | d | cd
 
 but also an example with w:
 ((* = FooBar*wcd)) || (kMDItemTextContent = FooBar*cd))
 
 10.6.2

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