Question

I have two NSMutableArray filled with data object. how do I compare both array and merge if any change found.

ex:
Array1= index(0) userName = {'a',1,'address'}
index(1) userName = {'b',2,'address'}

Array2= index(0) userName = {'c',3,'address'}
index (1) userName = {'b',2,'address'}

Result is:
Array= index(0) userName = {'a',1,'address'}
index (1) userName = {'b',2,'address'}
index(2) userName = {'c',3,'address'}

Please help

Answer 1

An easy way is to use sets:

NSMutableSet *set = [NSMutableSet setWithArray:array1];
[set addObjectsFromArray:array2];

NSArray *array = [set allObjects];

Though you will have to sort array yourself afterward.

(N.B., I used lowercase names for the variables as is usually customary).