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问题 I'm having a problem with a Windows Form application I'm building in C#. The error is stating "foreach statement cannot operate on variables of type 'CarBootSale.CarBootSaleList' because 'CarBootSale.CarBootSaleList' does not contain a public definition for 'GetEnumerator'". I can't seem to understand what is causing this. This is the code that is throwing up the error: List<CarBootSaleList> Sortcarboot = new List<CarBootSaleList>(); foreach (CarBootSale c in carBootSaleList) { if (c.Charity

问题 I want to ask you how to declare a variable that can be used by every method? I tried making the method's access type public but that didn't let me used its variable across other methods Moreover, I basically want to accumulate that variable with different values across different methods that's why I am asking this. NOTE: I want to avoid making any static classes. EDIT: For example, I did public decimal MiscMethod() { decimal value1 += 23m; } public decimal AutoMethod() { decimal value 1 +=

问题 I want to ask you how to declare a variable that can be used by every method? I tried making the method's access type public but that didn't let me used its variable across other methods Moreover, I basically want to accumulate that variable with different values across different methods that's why I am asking this. NOTE: I want to avoid making any static classes. EDIT: For example, I did public decimal MiscMethod() { decimal value1 += 23m; } public decimal AutoMethod() { decimal value 1 +=

问题 My understanding is that a subclass behaves exactly like the parent class except for the additional methods or those that get "rewritten" with the new and override keywords. Apparently, that's not correct. Please see the code below (brackets removed for readability) class BIG protected void Output(string text = "") Console.WriteLine("BIG - " + text); public void CallingOutput() Output("Outputting..."); class SMALL:BIG public new void Output(string text = "") Console.WriteLine("SMALL - " +

问题 I would like to call a method to give me a dict of all of the "non-private" (I use the term "private" somewhat loosely here since it does not really exist in Python) and non-builtin attributes (i.e. those that do not begin with a single or double underscore) on a class. Something like vars(MyClass) that would return only the "public" attributes on that class. I'm aware that from M import * does not import objects whose name starts with an underscore. (http://www.python.org/dev/peps/pep-0008/

问题 I would like to call a method to give me a dict of all of the "non-private" (I use the term "private" somewhat loosely here since it does not really exist in Python) and non-builtin attributes (i.e. those that do not begin with a single or double underscore) on a class. Something like vars(MyClass) that would return only the "public" attributes on that class. I'm aware that from M import * does not import objects whose name starts with an underscore. (http://www.python.org/dev/peps/pep-0008/

问题 I would like to call a method to give me a dict of all of the "non-private" (I use the term "private" somewhat loosely here since it does not really exist in Python) and non-builtin attributes (i.e. those that do not begin with a single or double underscore) on a class. Something like vars(MyClass) that would return only the "public" attributes on that class. I'm aware that from M import * does not import objects whose name starts with an underscore. (http://www.python.org/dev/peps/pep-0008/

问题 I would like to call a method to give me a dict of all of the "non-private" (I use the term "private" somewhat loosely here since it does not really exist in Python) and non-builtin attributes (i.e. those that do not begin with a single or double underscore) on a class. Something like vars(MyClass) that would return only the "public" attributes on that class. I'm aware that from M import * does not import objects whose name starts with an underscore. (http://www.python.org/dev/peps/pep-0008/

问题 This question already has answers here : Why should Test methods in Junit be defined public? (4 answers) Closed 4 years ago . I just want to know why the test cases (test methods) should be public like this public class SpiceLoginTest { @Test public void testShouldVerifyLoginRequest() { } } but if I remove public access specifier from this method @Test void testShouldVerifyLoginRequest() { } Output: java.lang.Exception: Method testShouldVerifyLoginRequest() should be public so What is

问题 When a user connects for the first time to a public hotspot they often get back a welcome page with a login, instead of the requested page. This can also happen when you request a page from code, leading to corruption. We expect this type of page should always return a "302 redirect", but hard evidence that this always happens is hard to come by and we think some users may be getting back corrupted data - with a 200 return from hotspots in the world. Does anyone know what the correct