predicates

I have an Artist object with a .localConcerts fetched property (basically a subset of the full . concerts set), can I use that property inside my NSFetchedResultsController predicate? Here's what I'm trying: NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Artist" inManagedObjectContext:context]; [request setEntity:entity]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"localConcerts.@count > 0"]; [request setPredicate:predicate]; fetchedResultsController = [[NSFetchedResultsController alloc]

I would like to construct an XPath query that will return a "div" or "table" element, so long as it has a descendant containing the text "abc". The one caveat is that it can not have any div or table descendants. <div> <table> <form> <div> <span> <p>abcdefg</p> </span> </div> <table> <span> <p>123456</p> </span> </table> </form> </table> </div> So the only correct result of this query would be: /div/table/form/div My best attempt looks something like this: //div[contains(//text(), "abc") and not(descendant::div or descendant::table)] | //table[contains(//text(), "abc") and not(descendant::div

consider following rules in the parser: expression : IDENTIFIER | (...) | procedure_call // e.g. (foo 1 2 3) | macro_use // e.g. (xyz (some datum)) ; procedure_call : '(' expression expression* ')' ; macro_use : '(' IDENTIFIER datum* ')' ; and // Note that any string that parses as an <expression> will also parse as a <datum>. datum : simple_datum | compound_datum ; simple_datum : BOOLEAN | NUMBER | CHARACTER | STRING | IDENTIFIER ; compound_datum : list | vector ; list : '(' (datum+ ( '.' datum)?)? ')' | ABBREV_PREFIX datum ; fragment ABBREV_PREFIX : ('\'' | '`' | ',' | ',@') ; vector : '#('

I am trying to create dynamic predicate so that it can be used against a list for filtering public class Feature { public string Color{get;set;} public string Weight{get;set;} } I want to be able to create a dynamic predicate so that a List can be filtered. I get few conditions as string values ">","<",">=" etc. Is there a way by which I can do this? public Predicate<Feature> GetFilter(X property,T value, string condition) //no clue what X will be { switch(condition) { case ">=": return new Predicate<Feature>(property >= value)//or something similar } } and the usage could be: var

This question already has an answer here: Is it possible to retrieve lambda expression at runtime 2 answers For debugging purposes I am trying to create string representations of lambda expressions (specifically of Predicate s, though it would be interesting for other lambda expressions too) in Java 8. My idea would be something like this: public class Whatever { private static <T> String predicateToString(Predicate<T> predicate) { String representation = ... // do magic return representation; } public static void main(String[] args) { System.out.println(Whatever.<Integer>predicateToString(i -

I want to convert this code to assembly using predicated instruction If (A>B){ C=A; D=B; E=0 } else{ C=B; } Is it correct or how can i use jump ? cmp R1,R2; considering B is assigned to R2 and A assigned to R1 movlf R3,R1;R3 assign to C mov R4,R2;R4 assign to D mov R5,0; R5 assign to E movlt R3,R2 WARNING : Answer for newbies. May bore experienced users to death. I'm not sure if you misused the terminology or if you really want to use predicated instructions 1 . In the latter case, using ARM v6 predication as a study case (and inheriting your premises about register usage), the assembly is