NSArray+PXArrayAdditions.h

@interface NSArray (PXArrayAdditions)
- (id)initWithObject:(id)object;
- (id)firstObject;
@end

NSArray+PXArrayAdditions.m

@implementation NSArray (PXArrayAdditions)

- (id)initWithObject:(id)object
{
	return [self initWithObjects:object,nil];
}

//Follows -lastObject in that returns nil if no objects present
- (id)firstObject
{
	if([self count]>0) {
		return [self objectAtIndex:0];
	}
	else {
		return nil;
	}
}

@end