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Editorial Team
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Asked: 2026-05-26T16:39:15+00:00

I have 2 NSArray , lets call it as CountriesArray and UNCountriesArray . The

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I have 2 NSArray, lets call it as CountriesArray and UNCountriesArray. The CountriesArray contains all the countries in the world and the UNCountriesArray contains all the countries that belongs to the united nations.

I Want to get the subset of the 2 arrays. so finally i should get an array that has the countries that does not belong to the united nations. Can some one help me write the objective-c code that gets the subset of the 2 arrays?

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1 Answer

  1. Editorial Team

    Use sets:

    NSMutableSet *countriesSet = [NSMutableSet setWithArray:countriesArray];
NSSet *unSet = [NSSet setWithArray:unCountriesArray];
[countriesSet minusSet:unSet];
// countriesSet now contains only those countries who are not part of unSet

    Keep in mind that the members of the set are unsorted. If you want to have a sorted array, you will have to re-sort the result.

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