Simple category on NSArray to process it in specified batch sizes

NSArray+Batching.h

@interface NSArray (Batching)

- (void) enumerateObjectsWithBatchSize:(NSUInteger)batchSize
	usingBlock:(void (^)(NSArray* batch, NSUInteger startIndex, BOOL *stop))block;

@end

NSArray+Batching.m

#import "NSArray+Batching.h"

@implementation NSArray (Batching)

- (void) enumerateObjectsWithBatchSize:(NSUInteger)batchSize
	usingBlock:(void (^)(NSArray* batch, NSUInteger startIndex, BOOL *stop))block
{
	if ( block == nil ) {
		return;
	}
	
	NSRange range = { .length = batchSize };
	BOOL stop = NO;
	while ( ! stop && range.location < [self count] ) {
		range.length = MIN(batchSize, [self count] - range.location);
		NSArray* batch = [self subarrayWithRange:range];
		
		block( batch, range.location, &stop);
		
		if ( ! stop ) {
			range.location += range.length;
		}
	}
}

@end