Question

I am new to tableViews and dictionaries and i have a problem!
In ViewDidLoad i am initializing many MutableArrays and i am adding data using NSDictionary. Example:

- (void)viewDidLoad {
nomosXiou=[[NSMutableArray alloc] init];

[nomosXiou addObject:[[NSDictionary alloc] initWithObjectsAndKeys:@"Mary",@"name",@"USA",@"country", nil]];
[nomosXiou addObject:[[NSDictionary alloc] initWithObjectsAndKeys:@"Peter",@"name",@"Germany",@"country", nil]]; 

[super viewDidLoad];
// Do any additional setup after loading the view.}

In a previous ViewController the user selects a Country. Based on that selection, how could i remove from my arrays all the other entries???

Thanks in advance…

Answer 1

First note that your code fragment has an error. It should read:

NSMutableArray *nomosXiou= [[NSMutableArray alloc] init];

There are a number of ways to do what you want, but the most straightforward is probably the following:

NSString *countryName;    // You picked this in another view controller
NSMutableArray *newNomosXiou= [[NSMutableArray alloc] init];

for (NSDictionary *entry in nomosXiou) {
    if ([[entry objectForKey:@"country"] isEqualToString:countryName])
        [newNomosXiou addObject:entry];
}

When this is done newNomosXiou will contain only the entries in nomosXiou that are from the country set in countryName.