Check that the contents of one NSArray are all in another array

Question

I have one NSArray with names in string objects like this:@[@\"john\", @\"smith\", @\"alex\", @\"louis\"], and I have another array that contains

Answer 1

You can use the concept of [NSArray containsObject:], where your objects will be from your array1 like you say "john","smith","alex","loui"

Answer 2

Run a loop and use isEqualToStiring to verify whether array1 objects exists in mainArray.

Answer 3

If you just need to check if all objects from array1 are in mainArray, you should just use NSSet e.g.

BOOL isSubset = [[NSSet setWithArray:array1] isSubsetOfSet:[NSSet setWithArray:mainArray]] 

if you need to check which objects are in mainArray, you should take a look at NSMutableSet

NSMutableSet *array1Set = [NSMutableSet setWithArray:array1];
[array1Set intersectSet:[NSSet setWithArray:mainArray]];
//Now array1Set contains only objects which are present in mainArray too