Thanks. As I said, I already read that but it doesn't give any examples on how to format subqueries. Anyway, I ended up adding a helper method to my subclass after all. It returns a single array of keywords, which I can examine using a predicate with format "(ANY keywords contains[c] %@, searchString)". It works fine. Perhaps even faster than running a subquery, I dunno.
F. On Mon, Jul 28, 2008 at 11:12 AM, Conrad Taylor <[EMAIL PROTECTED]> wrote: > Hi, I would recommend taking a look at the following document. > > http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/predicates.html > Good luck, > > -Conrad > > On Mon, Jul 28, 2008 at 1:02 AM, Fabian <[EMAIL PROTECTED]> wrote: > >> Thanks. Maybe I should have made myself a little more clear. I don't >> want to iterate over the array, but filter the array using a >> NSPredicate. >> >> I'm looking at the Predicate Programming Guide, which only gives basic >> guidance, and the docs for NSExpression. It has several class methods >> that "sound right" (expressionForEvaluatedObject:, >> expressionForAggregate:, >> expressionForSubquery:usingIteratorVariable:predicate:, >> expressionForFunction:arguments:) but provides no examples how to use >> them. Unfortunately Google has very little to say on this subject too. >> >> To repeat the problem: I want to check the value of all keys in every >> dictionary contained by an array and see if they match my search >> string. >> >> A workaround to compensate for my syntax ignorance would be to add a >> new instance method to my custom class that simply return all the >> values I want to check in a single array. Then I could query it with a >> simple single-relationship predicate: >> >> NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(%@ IN >> values, searchString)"]; >> NSArray filteredArray = [myArray filteredArrayUsingPredicate:predicate]; >> >> But somehow I believe there is a more direct way to do this, without >> having to add a new "helper method" to my class? I'm perfectly happy >> with a 10.5 only solution. >> >> Thanks. >> >> >> On Mon, Jul 28, 2008 at 8:30 AM, Graham Cox <[EMAIL PROTECTED]> >> wrote: >> > >> > On 28 Jul 2008, at 1:52 pm, Omar Qazi wrote: >> > >> >> To be honest, I don't know if this will work, since I don't know if >> >> containsObject is checking if the argument is a pointer to an object in >> the >> >> array, or if it is equal to the object, but it's better than nothing, I >> >> guess. >> > >> > >> > From the docs: >> > >> > containsObject: >> > Returns a Boolean value that indicates whether a given object is present >> in >> > the receiver. >> > >> > - (BOOL)containsObject:(id)anObject >> > >> > Parameters >> > >> > anObject >> > An object. >> > >> > Return Value >> > YES if anObject is present in the receiver, otherwise NO. >> > >> > Discussion >> > This method determines whether anObject is present in the receiver by >> > sending an isEqual: message to each of the receiver's objects (and >> passing >> > anObject as the parameter to each isEqual: message). >> > >> > Availability >> > • Available in Mac OS X v10.0 and later. >> > >> > >> > >> > >> > cheers, Graham >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/conradwt%40gmail.com >> >> This email sent to [EMAIL PROTECTED] >> > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/cocoa-dev/slasktrattenator%40gmail.com > > This email sent to [EMAIL PROTECTED] > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
