How to get last element from NSMutableArray in which status as complete?

Question

I have an array of dictionaries in following format

[
{
 "status":"not completed",
 "rating":2 
},{
"status":"completed",
 "rating":2 
},{
"status":"not completed",
"rating":"<null>" 
},{
 "status":"completed",
 "rating":"<null>"},{
"status":"not completed",
"rating":"<null>" 
}
]

and from this i want response as last object where status is completed and rating is null

output
{
     "status":"completed",
     "rating":"<null>"
}

how do i get second element easily without any big iteration.

in real case this array might contains 150-300 elements.

  -(void)checkRecentUnratedOrder:(NSMutableArray *)order{

    NSLog(@"trip log - %@",[order valueForKey:@"status"]); // total 5 objects inside array in that 4 of them are completed

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == completed"];
    NSArray *arr = [order filteredArrayUsingPredicate:predicate];

    NSLog(@"trip arr%@",arr);




}

console

Start at the end of the array and iterate backwards. As soon as you find an element with a "status" of "completed", return it. — user94559, Jul 16 '16 at 06:44

Nirav D · Accepted Answer · 2016-07-16T07:06:56.590

1

You need to predicate your array like this

NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == 'completed'"];
NSArray *arr = [order filteredArrayUsingPredicate:predicate];
// Now `arr` contains all the `dictionary` that `status` key contain `completed` value.

edited Jul 16 '16 at 07:06

answered Jul 16 '16 at 06:45

Nirav D

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can i add multiple conditions in predicate? – Bangalore Jul 16 '16 at 06:47
1

Yes, using separator `and` / `or` on the basis of condition. – Nirav D Jul 16 '16 at 06:48
Yes you can add multiple conditions. – Ajay Gabani Jul 16 '16 at 06:48
@Bangalore What other condition you want? – Nirav D Jul 16 '16 at 06:49
this is my code where Order is NSDictionary ----------------------- NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self.status == completed"]; NSArray *arr = [[order valueForKey:@"status"] filteredArrayUsingPredicate:predicate]; – Bangalore Jul 16 '16 at 06:50
You need to use new filtered array `arr` like my answer. – Nirav D Jul 16 '16 at 06:52
My status field is [order valueforkey:"status"] and order is NSMutableArray – Bangalore Jul 16 '16 at 06:55
Check my answer where i have use your `order` array change your code like that. – Nirav D Jul 16 '16 at 06:57
it showing empty array, even i have 4 completed one – Bangalore Jul 16 '16 at 06:57
Please put your whole code in question because you have something changed – Nirav D Jul 16 '16 at 06:58
If you create array like this `NSArray *arr = [[order valueForKey:@"status"]` then this array only contain value `completed` and `not completed` not the dictionary. – Nirav D Jul 16 '16 at 07:00
please check my question with console screenshot and code – Bangalore Jul 16 '16 at 07:02
check my edit, forgot to put `single quote` with completed please check it i have added `single quote`. – Nirav D Jul 16 '16 at 07:07
i need to check one more field "rating" whether its null or not – Bangalore Jul 16 '16 at 07:10
can you put the dictionary response and what you want from response? – Nirav D Jul 16 '16 at 07:11
rating format is like this rating = ""; i need only status completed and rating objects in array – Bangalore Jul 16 '16 at 07:11
Please add whole response of one dictionary from array that will be help full also check this is string because it is coming with `double quote`. – Nirav D Jul 16 '16 at 07:12
Have you check is string or something else. – Nirav D Jul 16 '16 at 07:15
yup it coming as "" in console – Bangalore Jul 16 '16 at 07:15
Not like that, check your last object of dictionary like this way `NSString *str = [arr lastObject] valueForKey:@"rating"]` and print value of `str` – Nirav D Jul 16 '16 at 07:17
printing as like this trip arr – Bangalore Jul 16 '16 at 07:29
@Nirav its crashing when i try to use array without any complete status [order filteredArrayUsingPredicate:predicate] – Bangalore Jul 16 '16 at 07:59

How to get last element from NSMutableArray in which status as complete?

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