NSPredicate on NSDictionary

Question

I\'m trying to make sections in a table view based on the alphabet and sort my entries alphabetically under these sections.

I have collected the first letter in every en

Answer 1

Sorry, I didnt notice you had a NSArray of NSDictionaries.

Read this thread: Using NSPredicate to filter an NSArray based on NSDictionary keys

When you use NSDictionary, you should check by its Key... I'm not sure you're using the right approach!

I would do something like: @implementation Word : NSObect { NSString *title; }

then I would create a NSArray of Words and filter on them with: @"title beginswith[c] %@"

Answer 2

Do you mean that bandsArray is an array of dictionaries? If so, and assuming each dictionary has a name key, you should be able to change the predicate to something like @"SELF.name beginswith[c] %@".

If, on the other hand, bandsArray is actually a dictionary itself, maybe you want to do [[bandsArray allKeys] filteredArrayUsingPredicate...].

Answer 3

#import <Foundation/Foundation.h>
// clang -framework Foundation Siegfried.m 
    int
main() {
    NSArray *arr = @[
        @{@"1" : @"Fafner"},
        @{@"1" : @"Fasolt"}
    ];
    NSPredicate *p = [NSPredicate predicateWithFormat: @"SELF['1'] CONTAINS 'e'"];
    NSArray *res = [arr filteredArrayUsingPredicate:p];
    NSLog(@"Siegfried %@", res);
    return 0;
}