NSPredicate for inner key in array of dictonary

Question

i have an array of dictionay in the following format

    [
 {
      \"student\": {
        \"id\": \"1\",

        \"studentUserDetail\": {
          \"firstName         


        

Answer 1

NSArray *array = @[
                  @{
                     @"student": @{
                             @"id": @"1",
                             @"studentUserDetail": @{
                                     @"firstName": @"Bonny",
                                     @"lastName": @"Roby"
                         }
                     }
                     },
                  @{@"student": @{
                            @"id": @"1",
                            @"studentUserDetail": @{
                                    @"firstName": @"Bonny",
                                    @"lastName": @"Kety"
                                }
                            }
                  },
                  @{
                     @"student": @{@"id": @"1",
                                   @"studentUserDetail": @{
                                           @"firstName": @"Arther",
                                           @"lastName": @"Fone"
                                           }
                                   }
                  }];

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(student.studentUserDetail.firstName) == %@", @"Bonny"];
NSArray *newArray = [array filteredArrayUsingPredicate:predicate];