NSArray+CFIWhere.h

//
//  NSArray+CFIWhere.h
//  CFIArrayController
//
//  Created by Robert Widmann on 4/9/13.
//  Copyright (c) 2013 CodaFi. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSArray (CFIWhere)

+ (instancetype)arrayWithObjectsFromArray:(NSArray*)sourceArray passingTest:(BOOL (^)(id obj, NSUInteger idx, BOOL *stop))testBlock;
- (NSArray*)where:(BOOL (^)(id obj, NSUInteger idx, BOOL *stop))predicate;

@end

NSArray+CFIWhere.m

+ (instancetype)arrayWithObjectsFromArray:(NSArray*)sourceArray passingTest:(BOOL (^)(id obj, NSUInteger idx, BOOL *stop))testBlock {
  return [sourceArray objectsAtIndexes:[sourceArray indexesOfObjectsPassingTest:testBlock]];
}

- (NSArray*)where:(BOOL (^)(id, NSUInteger, BOOL *))testBlock {
	return [self objectsAtIndexes:[self indexesOfObjectsPassingTest:testBlock]];
}