Question

I am having NSMutableArray as below

How can I fetch only those data that have experience_id=1 or Update those data?

Is there any other way without looping?

(
            {
            "exp_achievements" = "get certificate for best employee";
            "exp_achive_id" = 1;
            "experience_id" = 1;
        },
    {
            "exp_achievements" = "get certificate for best employee test";
            "exp_achive_id" = 3;
            "experience_id" = 1;
        },
            {
            "exp_achievements" = test2;
            "exp_achive_id" = 5;
            "experience_id" = 3;
        }
    )

Answer 1

You can use NSPredicate to filter collections:

NSMutableArray *a = [NSMutableArray arrayWithObjects:
                         [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:1] forKey:@"experience_id"],
                         [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:2] forKey:@"experience_id"], nil];
NSPredicate *f = [NSPredicate predicateWithFormat:@"experience_id == 1"];
[a filterUsingPredicate:f];

prints :

f:(
        {
        "experience_id" = 1;
    }
)

If your ‘experience_id’ value is string, change format to @"experience_id.intValue == 1"