Nspredicate for Array of Dictionaries

Filter Array with dictionaries using NSPredicate

Please see the below example:

 NSArray *array = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"filter string" forKey:@"email"]];   // you can also do same for Name key... 
    NSArray *filteredarray = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(email == %@)", @"filter string"]];

NSPredicate to filter an Array of Dictionaries (Swift)

I agree with the comment by @luk2302, in that using the Swift Array filter method is nicer in general than filtering with an NSPredicate. If you're worried about performance across a large data set you should have your content in CoreData and use an NSPredicate as part of an NSFetchRequest with proper indexing setup in your data model.

Having said that, filtering by NSPredicate is not explicitly supporting with the Swift Array type, so you would have to cast to NSArray to use it. It would look something like this:

let filteredArray = (arrayofDictionary as NSArray).filteredArrayUsingPredicate(speciesPredicate)

Filtering an array of arrays that contain a dictionary using NSPredicate

I am not sure if you can do it with a single predicate. But you can iterate through individual array of dictionaries, filter them and add the filtered list to your final array. Try something like this:

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"desc contains[c] %@", searchText];
NSMutableArray *finalColletion = [NSMutableArray array];
for (NSArray *temp in self.charactersAndDescriptions) {
    NSArray *result =[temp filteredArrayUsingPredicate:predicate];
    if([result count] > 0) {
        [finalColletion addObject:result];
    }
}

Filter data from array of Dictionary using predicate iOS SDK

This will give you your desired output

Objective - C

NSArray *filteredData = [yourArrayContainingDictionary filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"(mall_name contains[c] %@)", searchText]];

Swift

let filteredData = yourArrayContainingDictionary.filter{
    let string = $0["mall_name"] as! String

    return string.hasPrefix("searchText")
}

Hope this helps you :)

NSPredicate for Array of Dictionaries

You need the following

NSString *str = <search string>;
NSPredicate *pred = [NSPredicate predicateWithFormat:@"ANY Mens.Name LIKE %@ OR ANY Womens.Name LIKE %@", str, str];
NSArray *result = [your_array filteredArrayUsingPredicate:pred];
BOOL success = result.count > 0;

Filtering with NSPredicate, for array count of Array inside dictionary inside array

In this case that results in -valueForKey: @"count" being sent to each xyz instance, and xyz isn't key value coding compliant for count.

Instead, use the @count operator to evaluate the count of the collection when you want the count then use

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"xyz.@count>2"];

instead of

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"xyz.count>2"];

NSPredicate on array of dictionaries iOS

try like this,

NSArray *filtered = [array filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"self.id.%K == '1'",@"$id"]];

---

Related Topics