Make arrays from excluding strings

Question

I have 2 array of strings, lets say for simplicity it will be Array 1 - @[@"a",@"b",@"c"] and Array 2 will be - @[@"b",@"c", @"d"].

What i want is, to create an array from strings (yes, there will be strings, sometimes long enough, i put characters just for simplicity) that exclude strings contained in previous array. And second array, that otherwise, contain string that exist in first array and not exist in second.

So, with array i privded, it would be : resultArray1 = @[@"d] (exist in second array, but not in first) resultArray2 = @[@"a"] (exist in first array, but not in second)

How to enumerate through this arrays to get what i want to? Thanks.

Use sets the have methods for this, and the will return array also. — Dasem, Oct 14 '16 at 13:54

Sergey Kalinichenko · Accepted Answer · 2016-10-14T16:03:42.337

1

Make a NSMutableArray from the array with the items you want to keep, and call removeObjectsInArray: on it:

NSMutableArray res1 = [arr1 mutableCopy];
[res1 removeObjectsInArray:arr2];
NSMutableArray res2 = [arr2 mutableCopy];
[res2 removeObjectsInArray:arr1];

edited Oct 14 '16 at 16:03

answered Oct 14 '16 at 13:56

Sergey Kalinichenko

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@EvgeniyKleban I am sorry, I've been looking at Swift code for too long. – Sergey Kalinichenko Oct 14 '16 at 16:04

Make arrays from excluding strings

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