I have an multidimensional NSMutableArray and I want to sort it on one of the objects. The array is created so:
[NSMutableArrayName addObjectsFromArray:[NSMutableArray arrayWithObjects:[NSMutableArray arrayWithObjects:name,[NSNumber numberWithInteger:x],nil],nil]];
I can't find a way to sort the entire array using the value of the second object (the integer x).
Help appreciated as always.
This sounds like a good case for sortUsingComparator:. You use it something like this:
[NSMutableArrayName sortUsingComparator:^NSComparisonResult(id o1, id o2){
NSInteger a = [[o1 objectAtIndex:1] integerValue]; // Or however to extract the int from your array element
NSInteger b = [[o2 objectAtIndex:1] integerValue];
if (a < b) return NSOrderedAscending;
if (a > b) return NSOrderedDescending;
return NSOrderedSame;
}];
If you're targeting pre-iOS 4.0, you can accomplish much the same thing using sortUsingFunction:context: and putting the block content into a C-style function.
