filtering Dictonaries in array - iphone

Question

Here I want to filter dictionary in the array which contains the "cate = subcat"
could anybody help me please
menuArr :(
{
Cate = subcat;
Description = "Grilled Chicken";
Id = 2;
Image = "http://asaraa.com/our_development/restaurant/admin/logo_image/large/28322grilled_chicken.jpg";
Name = "Grilled Chicken";
Price = 0;
Qty = "";
Title = "grilled chicken";
},
{
Cate = product;
Description = gravey;
Id = 12;
Image = "http://asaraa.com/our_development/restaurant/admin/logo_image/large/27166mutton.jpg";
Name = gravey;
Price = 50;
Qty = 1;
Title = gravey;
},
{
Cate = product;
Description = "Chicken Korma";
Id = 15;
Image = "http://asaraa.com/our_development/restaurant/admin/logo_image/large/77845Indian_chicken_recipes.jpg";
Name = "Chicken Korma";
Price = 99;
Qty = 1;
Title = "Chicken Korma";
},
{
Cate = subcat;
Description = "Chicken Sandwiches";
Id = 16;
Image = "http://asaraa.com/our_development/restaurant/admin/logo_image/large/67831chicken-sandwich-melt-0204_300.jpg";
Name = "Chicken Sandwiches";
Price = 0;
Qty = "";
Title = "Chicken Sandwiches";
}
)

Answer 1

NSString *searchString = #"subcat"
NSPredicate *predicate = [NSPredicate predicateWithFormat:#"Cate = %#",searchString];
NSArray *array = [yourArray filteredArrayUsingPredicate:predicate];
if (array.count > 0)
{
// here goes your code
}

Answer 2

Using Linq to ObjectiveC you can filter it as follows:
NSArray* itemsInCategory = [menuArr where:^BOOL(id dic) {
return [[dic objectForKey:#"Cate"] isEqualToString:#"subcat"];
}];
This finds all the dictionaries where Cate=subcat.

Answer 3

Use NSPredicate
NSArray *filtered = [yourArray filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:#"(Cate LIKE[CD] %#)", #"subcat"]];