Use of predicates-ios

#import <Foundation/Foundation.h> @interface person:nsobject<nscopying> @property (nonatomic,copy) NSString *name; @property (nonatomic,retain) NSNumber *age;-(void) Setnewname: (NSString *) name; @end

#import "Person.h" @implementation person:nsobject-(ID) Copywithzone: (Nszone *) zone{person    *person=[[[self class ] [Allocwithzone:zone] init];    Person.name=_name;    Person.age=_age;    return person;} -(void) Setnewname: (NSString *) name{    self.name=name;} -(NSString *) description{    nsstring *description=[nsstring stringwithformat:@ "Age:%@; Name:%@", _age,_name];    return description;} @end

predicate usage nspredicate nsmutablearray *array=[nsmutablearray array];            for (int i=0, i<10; i++) {person *person=[[person alloc]init];            [Person setage:@ (20+i)];            Person.name=[nsstring stringwithformat:@ "jage-%d", I];        [Array Addobject:person];        }//large, small, etc, etc arithmetic filtering nspredicate *predicate=[nspredicate predicatewithformat:@ "age<%d", 25];        Nspredicate *predicate2=[nspredicate predicatewithformat:@ "age<23", 23];        Nspredicate *predicate3=[nspredicate predicatewithformat:@ "age<27 and age>25"];        Nspredicate *predicate4=[nspredicate predicatewithformat:@ "age<27 && age>25"];        Nspredicate *predicate5=[nspredicate predicatewithformat:@ "age<23 | | age>26"];        Nspredicate *predicate6=[nspredicate predicatewithformat:@ "name= ' jage-3 '"];        Inside a certain nspredicate *predicate7=[nspredicate predicatewithformat:@ "name in {' Jage-1 ', ' jage-5 '}"]; Nsarray *[email protected][@ "jage-1", @ "jage-4", @ "jage-3"];        Nspredicate *predicate8=[nspredicate predicatewithformat:@ "name in%@", InArray];        What has started, note plus single quotes nspredicate *predicate9=[nspredicate predicatewithformat:@ "name Beginswith ' Jage '"];        What has ended, note the addition of single quotes Nspredicate *predicate10=[nspredicate predicatewithformat:@ "Name ENDSWITH '-9 '"];        Included, note plus single quotes nspredicate *predicate11=[nspredicate predicatewithformat:@ "Name CONTAINS '-3 '"];        Like, note the extra single quote nspredicate *predicate12=[nspredicate predicatewithformat:@ "name like ' jage-?"];                Nspredicate *predicate13=[nspredicate predicatewithformat:@ "name like ' *-2 '"]; For (person *person in array) {if ([Predicate6 Evaluatewithobject:person]) {//Object-by-case NSLog (@ "%@",            person);        }}//log Group filter Nsarray *filterarray=[array FILTEREDARRAYUSINGPREDICATE:PREDICATE13]; NSLog (@ "%@", Filterarray);