无法编译为什么下面没有在斯卡拉编译: class A
class B
object X {
def f[Q <: A](q: Q): Q = q
def f[Q <: B](q: Q): Q = q
}
与错误信息 <console>:16: error: method f is defined twice
conflicting symbols both
我们导入了一个过时的项目,它促使我们将其转换为Swift 3.作为对Swift不太了解的个人,我们在修复错误时遇到困难。 Error can be found at this image import Foundation
class CellDescriptorHelper {
let itemKey = "Items"
let isExpandableKey = "isExpanda
假设我有一个通用的容器类型这样的: public final class Container<T> {
public final T t;
public Container(final T t) {
this.t = t;
}
}
我想要实现等于使得该通行证: final Container<Object> a = new Container<>
(弗林克1.3) 我与类型的提取问题: The return type of function '...' could not be determined
automatically, due to type erasure. You can give type information hints
by using the returns(...) method on the result o