How to combine two array values at a particular index from two different arrays

Question

I want two take the values at index 0 from two separate arrays and combine them together. For example, let's say the value at index 0 for array1 is NSNumber 5 and the value at index 0 for array2 is NSNUmber 7, how can I get a integer that says that the sum of the two values is 12? I'm just looking for a general answer but this is the code I have so far

NSNumber *j = [self.array1 objectAtIndex:0];
NSNumber *k = [self.array2 objectAtIndex:0];

I can't just simply add the two, but what do I have to do to allow me to add them?

j.integerValue will give you the integer value so you can add it. — rdelmar
– rdelmar, Commented Nov 17, 2013 at 1:58

Mick MacCallum · Accepted Answer · 2013-11-17 02:10:31Z

3

If them are NSNumber and you want another NSNumber, you must to do:

NSNumber *n = [NSNumber numberWithInt:[[self.array1 objectAtIndex:0] intValue] + [[self.array2 objectAtIndex:0] intValue]];

Or using modern Objective C syntax, this can be shortened significantly.

NSNumber *n = @([self.array1[0] intValue] + [self.array2[0] intValue]);

edited Nov 17, 2013 at 2:10

Mick MacCallum

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answered Nov 17, 2013 at 2:07

Matteo Gobbi

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Comments

godel9 · Accepted Answer · 2013-11-17 01:59:29Z

0

Assuming they're integers, you can use:

NSInteger result = [j integerValue] + [k integerValue];

See the NSNumber Class Reference if they're stored as other types.

answered Nov 17, 2013 at 1:59

godel9

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