์นดํ ๊ณ ๋ฆฌ ์์ ์ฝ๋ฐฑํจ์ ipod apple 2009. 10. 16. 00:45 ๋ฐ์ํ ๋ค ๋ฅ์น๊ณ ์ด๊ฑธ ๋ณด๋ฉด ๋๋ค. http://en.wikipedia.org/wiki/Callback_(computer_science) ๋ฐ์ํ