为什么这个方法(测试)需要一个返回值(它总是正确的)?public boolean test() { //This method must return a result of type boolean returntrue; // always return true}public boolean test(int i) {
我试图从我的WPF view model命令中显示一个对话框,但是当我调用ShowDialog()时,它抛出了一个System.ArgumentException,我想知道是否有人可以给我一个提示,为什么?Public ReadOnly Property OpenParser As ICommand Return New RelayCommand(Sub(param As Object) OpenParserExecute(DirectCast(param, Frame)))End Property
Public
如何在使用管道和映射时返回值,如下图所示: map(x => {
return this.service.someValueTS2322: Type 'Subscription' is not assignable to type 'boolean | Observable<boolean> | Promise<booleanType 'Subscription'