I have list of values here.
NSArray *allvalues = [subjectValue allValues]; // subjectValue is Mutable dictionary
log printed like below,
allvalues: (
(
"service3#citicorp.com",
"IMPORTANT - Documents required"
),
(
LinkedIn,
"Do you know Daniel?"
),
(
“Dave steve”,
"RE: Development"
),
(
Angelour TB,
"Score High on it”
),
(
MyntraCavin,
"EORS: Sneak Peek!"
)
)
I want to use Search feature and find the content from this array.
I tried,
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF contains[c] %#",searchText];
and,
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"ANY SELF == %#", searchText];
and,
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"SELF == %#", searchText];
to get the filtered array values,
NSArray *filteredValues = [allvalues filteredArrayUsingPredicate:predicate];
NSSet *keys = [subjectValue keysOfEntriesPassingTest:^BOOL(id key, id obj, BOOL *stop) {
return [filteredValues containsObject:obj];
}];
NSLog(#"subjectValue key desc: %#", keys.description);
if (keys!=nil)
filteredUidArray = [keys allObjects];
But, filteredValues always returns me nil with the above 3 predicate search. Could someone advise how can I get the values filtered for this kind of array format allvalues.
You are over-using the collection classes. Instead create a custom object for the dictionary values and give this class properties that can be used with predicates:
#interface MyValue : NSObject
#property (nonatomic) NSString *someReference;
#property (nonatomic) NSString *someComment;
#end
Related
I have a NsMutableArray. I filtered matched data with NSPredicate but i want that array element which is not matched.
Can anyone help me.
You can use NOT with the predicate for that
NSArray *arrValues = [NSArray arrayWithObjects:#"Hello",#"Hello One",#"Good Morning", nil];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"NOT (SELF CONTAINS %#)",#"Hello"];
NSArray *arrFiltered = [arrValues filteredArrayUsingPredicate:predicate];
NSLog(#"%#",arrFiltered);
Output
(
"Good Morning"
)
Its my code :
-(NSArray *)searchTeamsWithPlayerPharse:(NSMutableArray *)teams phrase:(NSString *)phrase
{
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:#"rel_Players.fullName CONTAINS[c] %#" ,phrase];
NSArray *searchResult = [teams filteredArrayUsingPredicate:searchPredicate];
return searchResult ;
}
It is not working. In array I have Team objects. Team has relationship with players and i want filtr with this relathionship and find only teams with players have pharse in fullName. How to change this NSPredicate
The ANY operator should work:
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:#"ANY rel_Players.fullName CONTAINS[c] %#" ,phrase];
Some additional remarks:
a rel_ prefix is unusual and unnecessary: the plural form players is enough and the underscore can be omitted because the beginning of a new word is marked by an uppercase character (camel case).
The method does not need to take a mutable array argument. This restricts the use cases to arguments of type NSMutableArray. If you change the parameter type to NSArray * you can use instances of both NSArray and NSMutableArray.
The method does not work on the instance context: It does not have a single access to self. You can make a function out of it or – I would prefer that – make it a method of NSArray.
Taking this together:
#interface NSArray(TeamPlayerAddition)
-(NSArray *)teamsWithPlayerPharse:(NSString *)phrase
#end
#implementation NSArray(TeamPlayerAddition)
-(NSArray *)teamsWithPlayerPharse:(NSString *)phrase
{
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:#"ANY rel_Players.fullName CONTAINS[c] %#" ,phrase];
return [self filteredArrayUsingPredicate:searchPredicate];
}
#end
I have CoreData Table with NSString field. But in the filter I need to be interpreted as float.
fieldName.floatValue does not give the correct result. If any way to do this without changing the field type in the table ?
Edit:
Data is:
company = "CompanyName";
date = "2016-01-17";
value = "379.76";
My predicate
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"value.floatValue > 2000"];
But value 379.76 enters the result. Using value.floatValue all the same values are compared as strings.
TNX
If you know value is not negative, you can use this trick:
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"abs:(value) > 2000"];
The abs: forces SQLite to treat the value attribute as a number.
Alternatively, add zero to it (which works for negative numbers):
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"add:to:(value,0) > 2000"];
I think you should change String type to Number, this is the easiest way.
You can use this predicate:
NSPredicate *predicate = [NSPredicate predicateWithBlock:^BOOL(id _Nonnull evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings) {
return [[evaluatedObject value] floatValue] > 2000; // Change id to your Class
}];
But this predicate can not be used with CoreData. So you should store the fetch result to an array, then use this predicate with it.
//Try with this.
// '>' will apply when 'value' is number. So, I first put your values in an array. Only then, I can apply the predicate.
NSString *company = #"CompanyName";
NSString *date = #"2016-01-17";
NSString *value = #"379.76";
NSArray *dataArray = #[#(value.floatValue),#(379.76),#(379),#(200)];
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"self > %f",200.0];
NSArray *array = [dataArray filteredArrayUsingPredicate:predicate];
//output:#(379.76),#(379.76),#(379)
Try this:
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"value > 2000"];
How do I filter an array of objects by a specific field?
My code:
NSMutableArray *inputArray = [[NSMutableArray alloc]init];
Person *person = [[Person alloc]init];
person.first_name = #"John";
[inputArray addObject: person];
person = [[Person alloc]init];
person.first_name = #"Jack";
[inputArray addObject: person];
NSString *expression = [NSString stringWithFormat:#"SUBQUERY(inputArray, $object, $object.first_name CONTAINS[c] J"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:expression];
NSMutableArray *filteredArray = [[inputArray filteredArrayUsingPredicate:predicate]mutableCopy];
NSLog(#"Count should be 2: %lu",(unsigned long)filteredArray.count);
This is the error I get:
'NSInvalidArgumentException', reason: 'Unable to parse the format string "SUBQUERY(inputArray, $object, $object.first_name CONTAINS[c] J"'
This is a basic example for testing. The real-case scenario is that I have an array of objects (Person or whatever) and I want to filter that array by certain fields within the objects ie first_name. As the user types we will filter a visual list based on what they type - so typing "J" would yield 2 results, but then when they type "Jo" only "John" appears on the list.
What am I doing wrong?
EDIT
Still doesn't seem to be working. Updated code:
DOVisitor *vi = [inputArray objectAtIndex:0];
NSLog(#"NAME: %#",vi.first_name);
NSPredicate *firstNamePredicate=[NSPredicate predicateWithFormat:#"first_name LIKE[cd] %#", #"Jo"];
NSPredicate *lastNamePredicate =[NSPredicate predicateWithFormat:#"last_name LIKE[cd] %#", #"Jo"];
NSPredicate *finalPredicate = [NSCompoundPredicate orPredicateWithSubpredicates : #[firstNamePredicate, lastNamePredicate]];
NSArray *filteredArray = [[inputArray filteredArrayUsingPredicate:finalPredicate]mutableCopy];
NSLog(#"Count should be 1: %d", [filteredArray count]);
I get an empty array back. However when I print the first object of the inputArray the console logs "John"
EDIT
Using CONTAINS instead of LIKE does the trick
You don't need a subquery for this, this is a very basic filter.
NSPredicate * predicate = [NSPredicate predicateWithFormat:#"first_name CONTAINS[cd] %#", #"j"];
Let us say you have Person object and you are trying to search for both firstName and lastName, then you can use:
NSPredicate *firstNamePredicate=[NSPredicate predicateWithFormat:#"firstName LIKE[cd] %#", #"Jo"];
NSPredicate *lastNamePredicate =[NSPredicate predicateWithFormat:#"lastName LIKE[cd] %#", #"Jo"];
NSPredicate *finalPredicate = [NSCompoundPredicate orPredicateWithSubpredicates : #[firstNamePredicate, lastNamePredicate]];
The final Predicate is generated by oring the previous predicates. So even if Jo is present in firstName or lastName, that Person object will pass the predicate test.
Edit:
Get filtered objects with above predicate
NSArray *filteredArray = [inputArray filteredArrayUsingPredicate:finalPredicate];
Hey i want to filter an NSArray. In this Array is a lot of information like name, town, telephonenumber, and so on. But some towns are twice or three times in the array.
I have property with a town in it.
So i want only those objects from the arry which match with the property.
For example:
in the Array stands:
Frank, New York, 123456
Oliver, New York, 123456
Thomas, Boston, 123456
and when the property is New York i want olny objects 1 and 2.
Does anyone has an idea how i can do it?
This is my code:
NSString *filterString = newsArticle;
NSPredicate *prediacte = [NSPredicate predicateWithFormat:[NSString stringWithFormat:#"Ort == '%#'",filterString]];
newsTownArray = [news filteredArrayUsingPredicate:predicate];
and when i come to the line:
cell.textLabel.text=[[newsTownArray objectAtIndex:indexPath.row] objectForKey:"Name"];
You need to use NSPredicate for this.
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"town == 'New York'"];
[yourArray filterUsingPredicate:predicate];
Dynamically you can create predicate like:
NSPredicate *predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:#"town == '%#'",yourInput]];
Here yourInput is a NSString which holds the required town name.
Please check these articles for more details:
codeproject
useyourloaf
Use this code
NSMutableArray *subpredicates = [NSMutableArray array];
for(NSString *term in arryOfWordsToBeSearched) {
NSPredicate *p = [NSPredicate predicateWithFormat:#"self contains[cd] %#",term];
[subpredicates addObject:p];
}
NSPredicate *filter = [NSCompoundPredicate andPredicateWithSubpredicates:subpredicates];
result = (NSMutableArray*)[arryOfDummyData filteredArrayUsingPredicate: filter];
However you can do it within an array with the use of NSPredicate, but I will suggest to do bit differently, this will add up to your code and good programming way.
Create a custom class Person having these properties name, city and telephone.
Create an array that will store objects of Person.
After this you can manipulate/ filter / sort etc quite easily.
NSString *filterCity=#"Delhi";
NSMutableArray *yourArray=[NSMutableArray arrayWithArray:self.persons];
NSPredicate *predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:#"city == '%#'",filterCity]];
[yourArray filterUsingPredicate:predicate];
NSLog(#"Filtered");
for (Person *per in yourArray) {
NSLog(#"Name: %#, City: %#, Telephone: %#",per.name, per.city, per.telephone);
}