how to get data from array

Question

I have NSMutableArray as below.

products = (
        {
        fullName = Fahim;
        id = 1;
        photoName = "family-1.png";
    },
        {
        fullName = Nikhat;
        id = 2;
        photoName = "family-2.png";
    },
        {
        fullName = Naju;
        id = 3;
        photoName = "family-3.png";
    },
        {
        fullName = Dasd;
        id = 7;
        photoName = "family-7.png";
    },
        {
        fullName = Galib;
        id = 8;
        photoName = "family-8.png";
    }
)

Now what I want is pull data based on id.

e.x. if I say I need data for id 8, I should get fullName as Galib.

Any idea how to get this done? I am week in arrays.

score 2 · Accepted Answer · answered Jul 25 '13 at 19:02

2

In general you can replace value by %d as well.

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"id == %d",YOUR_ID_VALUE];

For now you can use below,

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"id == 8"];
NSArray *filter = [array filteredArrayUsingPredicate:predicate];
NSLog(@"%@",filter);

answered Jul 25 '13 at 19:02

Apurv

17,116
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I didn't accepted because SO time limit for accepting answers... – Fahim Parkar Jul 25 '13 at 19:12

Sanjay Chaudhry · Answer 2 · 2013-07-25T19:16:20.267

1

If you need to pull by id, use NSDictionary instead.

NSDictionary * products = @{
    @1: @{ @"fullName": @"Fahim", @"photoName":@"family-1.png"}, 
    @2: @{ @"fullName": @"Nikhat" @"photoName":@"family-2.png"}
};

That's still not the optimum way of doing it... hard to devise that without knowing your full requirements.

edited Jul 25 '13 at 19:16

answered Jul 25 '13 at 18:57

Sanjay Chaudhry

3,181
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31

1

The items in the array _are_ dictionaries. – jscs Jul 25 '13 at 18:57
sample example code please... – Fahim Parkar Jul 25 '13 at 18:59
1

@FahimParkar: How about if _you_ put some sample code up? This is super basic stuff. – jscs Jul 25 '13 at 19:00
This should be a comment, not an answer. – LittleBobbyTables - Au Revoir Jul 25 '13 at 19:06
@JoshCaswell, It doesn't matter what the items are. They should be stored in a dictionary and not array if they need to be searched by a key. – Sanjay Chaudhry Jul 25 '13 at 19:07
1

There's no need to duplicate the existing dictionary keys at another level. An array of dictionaries is a perfectly reasonable arrangement, and it can already be filtered or searched by _any_ of the keys in the dictionaries. – jscs Jul 25 '13 at 19:09
@FahimParkar, I've added the sample code. – Sanjay Chaudhry Jul 25 '13 at 19:17

how to get data from array

2 Answers2