##Available
###NSFileManager
+ (NSString *)libraryPath+ (NSString *)documentsPath+ (NSString *)cachesPath+ (NSString *)preferencesPath+ (NSString *)tmpPath
###NSObject
- (BOOL)isNULL
- (id)firstObject- (BOOL)isEmpty- (NSArray *)reverseArray
- (id)firstObject- (BOOL)isEmpty- (NSMutableArray *)reverseArray
- (BOOL)hasKey:(NSString *)key- (BOOL)isEmpty
- (BOOL)isNotEqualToString:(NSString *)string- (BOOL)containsString:(NSString *)string- (NSString *)stringBetweenString:(NSString *)start andString:(NSString*)end
- (NSNumber *)floorNumber- (NSNumber *)ceilNumber- (NSNumber *)roundNumber+ (NSNumber *)numberFromString:(NSString *)string- (BOOL)isLessThanNumber:(NSNumber *)number- (BOOL)isMoreThanNumber:(NSNumber *)number
- (NSString *)stringValue