Re: Checking One Array Against Another
Re: Checking One Array Against Another
- Subject: Re: Checking One Array Against Another
- From: Pierce Freeman <email@hidden>
- Date: Sat, 29 Nov 2008 10:00:04 -0800
- Thread-topic: Checking One Array Against Another
The only problem with running that is that I get a error in the log and it
doesn't seem to be working:
-[NSCFSet minusSet:]: mutating method sent to immutable object
My slightly modified code is below:
NSMutableSet *openApplicationsSet = [NSSet setWithArray:openApplications];
NSSet *allowedApplicationsSet = [NSSet
setWithArray:applicationsAllowedMutableArray];
NSSet *badApplicationsSet = [openApplicationsSet
minusSet:allowedApplicationsSet];
NSLog(badApplicationsSet);
Sincerely,
Pierce F.
On 11/28/08 10:51 PM, "Graff" <email@hidden> wrote:
> On Nov 28, 2008, at 9:59 PM, Pierce Freeman wrote:
>
>> Would there be some way using the NSSet method to output a list of the
>> applications that the user needs to close in order for the current
>> applications to be "in the good list"?
>
> You can use the NSMutableSet method minusSet:
>
> NSSet *allowedSet = [NSSet setWithObjects:@"one",@"two",@"three",nil];
> NSMutableSet *openSet = [NSMutableSet
> setWithObjects:@"one",@"four",@"five",nil];
>
> if([openSet isSubsetOfSet:allowedSet])
> NSLog(@"The user has only the okay applications open");
> else
> {
> NSLog(@"The user has these not okay applications open:");
> [openSet minusSet:allowedSet];
> for(id anItem in openSet)
> NSLog(anItem);
> }
>
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