개발 언어 관련

#Block

 - 선언법 : 2012/06/18 - [iOS Dev] - [objective-C] 블럭코드(block) 선언법

#Clang

 - 컬렉션 표기 (Collection Notation) : 

# Toll-Free Bridging

 - 설명 및 가능 목록 : https://developer.apple.com/library/prerelease/ios/documentation/General/Conceptual/CocoaEncyclopedia/Toll-FreeBridgin/Toll-FreeBridgin.html#//apple_ref/doc/uid/TP40010810-CH2

 : NSRunLoop - CFRunLoop, NSBundle - CFBundle, NSDateFormatter - CFDateFormatter are not toll-free bridged.