How to split an NSArray into two equal pieces?

Question

I have an NSArray, and I want to split it into two equal pieces (if odd \"count\" then add to the latter new array) - I want to split it \"down the middle\" so to speak.

Answer 1

If you want an extra object on first array (in case total items are odd), use following code modified from Alex's answer:

NSArray *arrayTotal = [NSArray arrayWithObjects:@"A", nil];
//NSArray *arrayTotal = [NSArray arrayWithObjects:@"A", @"B", nil];
//NSArray *arrayTotal = [NSArray arrayWithObjects:@"A", @"B", @"C", nil];
//NSArray *arrayTotal = [NSArray arrayWithObjects:@"A", @"B", @"C", @"D", nil];
//NSArray *arrayTotal = [NSArray arrayWithObjects:@"A", @"B", @"C", @"D", @"E", nil];

NSArray *arrLeft;
NSArray *arrRight;

NSRange range;
range.location = 0;
range.length = ([arrayTotal count] % 2) ? ([arrayTotal count] / 2) + 1 : ([arrayTotal count] / 2);

arrLeft = [arrayTotal subarrayWithRange:range];

range.location = range.length;
range.length = [arrayTotal count] - range.length;

arrRight = [arrayTotal subarrayWithRange:range];

NSLog(@"Objects: %lu", (unsigned long)[arrLeft count]);
NSLog(@"%@", [arrLeft description]);

NSLog(@"Objects: %lu", (unsigned long)[arrRight count]);
NSLog(@"%@", [arrRight description]);