함수참조
var showSeatStatus = function(seatNum){ alert("This seat is " + getSeatStatus(seatNum) + "."); }; var myShowSeatStauts = showSeatStatus; function doThis(num) { num++; return num; } function doThat(num) { num--; return num; } var x = doThis(11); console.log(x) //12 var y = doThat; console.log(y) var z = doThat(x) //11 console.log(z) x = y(z); //10 console.log(x) y = x; alert(doThat(z - y)); 함수 참조..