If Orange Was a Place

F-102, a supersonic, high altitude fighter interceptor designed to intercept Soviet bombers was given the mission of intercepting,identifying and, if necessary

(a, b) = let val m = if (b = 0) then 0 else if (a >= 0) then a div b else ~a div b val n = if (b = 0) then 1 else if (a >= 0) then a mod b else ~a mod

searched. Finally, if no binding was found, an error was signaled. When a combination was encountered, the function position was evaluated differently

most recent value of the free variable. Such a search may be quite deep and slow if the free variable was bond vary far up in the stack. However, this

ifTrue:、ifFalse:、ifTrue:ifFalse:和ifFalse:ifTrue:方法。比如向一个布尔对象，发送ifTrue:消息，并传递一个代码块作为实际参数，这个块被执行当且仅当布尔接收者为真。下面用一个例子来展示： result := a > b ifTrue: [