好像Android中回調(diào)啊
private CallBack callback;
if(callback != null){
callback.void();
}
private CallBack callback;
if(callback != null){
callback.void();
}
2017-03-17
"func topOne<T: Comparable>(seq: T) -> T" 里面的"seq.count"和"seq.reduce"報(bào)錯(cuò):"Value of type 'T' has no member 'count' "
已采納回答 / hdadan
precedencegroup ComparativePrecedence{ ? ? ? ? //定義運(yùn)算符優(yōu)先級? ? associativity: right? ? higherThan: LogicalConjunctionPrecedence}infix operator ** : ComparativePrecedencefunc **(x: Double, p:Double) -> Double{?? ?? ? return pow(x,p)}
2017-03-11