NSArray category for getting a random index or object

NSArray+Random.h

//
//  NSArray+Random.h
//
//  Just some nice little addons for NSArray that I'm surprised don't actually exist already. Grab
//  a random object or an index for a random object. Bam. Presto.
//
//  Created by Jason Jones on 5/18/12.
//  Copyright (c) 2012 Saxifrage Systems LLC. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSArray (Random)

- (id)randomObject;
- (NSUInteger)randomIndex;

@end

NSArray+Random.m

//
//  NSArray+Random.m
//
//  Created by Jason Jones on 5/18/12.
//  Copyright (c) 2012 Saxifrage Systems LLC. All rights reserved.
//

#import "NSArray+Random.h"

@implementation NSArray (Random)

- (id)randomObject {
	return [self objectAtIndex:[self randomIndex]];
}

- (NSUInteger)randomIndex {
	return arc4random() % [self count];
}

@end