Swift2.2, [T]()调用append报错

Question

 

//Swift2.2:
//修改anyCommonElements函数来创建一个函数，返回一个数组，内容是两个序列的共有元素。

func anyCommonElements2<T,U where T: SequenceType, U: SequenceType, T.Generator.Element: Equatable, T.Generator.Element == U.Generator.Element> (lhs: T, _ rhs: U) -> T {
        var result = [T.Generator.Element]()//在这里也会报错
        for lhsItem in lhs {
            for rhsItem in rhs {
                if lhsItem == rhsItem {
                    result.append(rhsItem) //在这里报错
                }
            }
        }
        
        return result
}

xcode7.3  swift2.2

result.append() 报 Cannot invoke "append" with an argument list of type "(T.Generator.Element)"

我是初学者。请大佬指点。多谢。

Answer 1

> var result：[T.Generator.Element] = []
> var result = [] as [T.Generator.Element]
> var result = Array< T.Generator.Element>()