BlocksKitのselectとmatchの置き換え

gistfile1.m

//-------------------------------------------------------------------------
// MSBlocks.h
//-------------------------------------------------------------------------
@interface MSBlocks : NSObject
+ (NSArray *)array:(NSArray *)array select:(BOOL(^)(id))block;
+ (id)find:(NSArray *)array match:(BOOL(^)(id))block;
@end

//-------------------------------------------------------------------------
// MSBlocks.m
//-------------------------------------------------------------------------
#import "MSBlocks.h"

@implementation MSBlocks

+ (NSArray *)array:(NSArray *)array select:(BOOL(^)(id))block
{
    NSMutableArray *results = [NSMutableArray arrayWithCapacity:array.count];
    for (NSObject *obj in array) {
        if (block(obj)) [results addObject:obj];
    }
    return results;
}

+ (id)find:(NSArray *)array match:(BOOL(^)(id))block
{
    for (NSObject *obj in array) {
        if (block(obj)) return obj;
    }
    return nil;
}

@end