What does this do?

cardA.contents = @[cardB.contents,cardC.contents][[cardB match:@[cardC]] ? 1 : 0];

另附：

card.h:

#import

@interface Card : NSObject

@property (strong, nonatomic) NSString *contents;

@property (nonatomic, getter=isChosen) BOOL chosen;

@property (nonatomic, getter=isMatched) BOOL matched;

- (int)match:(NSArray *)otherCards;

@end

card.m:

#import "card.h"

@implementation Card

-(int) match:(NSArray *)otherCards

{

    int score = 0;

    for (Card *card in otherCards) {

        if ([card.contents isEqualToString:self.contents]) {

            score = 1;

        }

    }

    return score;

}

@end