dynamic

问题 I'm listening to a talk about C#4 's dynamic keyword and I'm wondering... Will this feature be orthogonal to other .NET features, for example will it support extension methods? public static class StrExtension { public static string twice(this string str) { return str + str; } } ... dynamic x = "Yo"; x.twice(); // will this work? Note: This question was asked before C#4 was shipped which is why it's phrased in the future tense. 回答1: From the "New Features in C# 4" word doc: Dynamic lookup

问题 In javascript you can detect if a property is defined by using the undefined keyword: if( typeof data.myProperty == "undefined" ) ... How would you do this in C# using the dynamic keyword with an ExpandoObject and without throwing an exception? 回答1: According to MSDN the declaration shows it is implementing IDictionary: public sealed class ExpandoObject : IDynamicMetaObjectProvider, IDictionary<string, Object>, ICollection<KeyValuePair<string, Object>>, IEnumerable<KeyValuePair<string, Object

问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 8 years ago . In the external C++ learning resource that I'm reading. What is an example on this statement? When a variable goes out of scope, or a dynamically allocated variable is explicitly deleted using the delete keyword,

问题 Hi, The table shown in the picture is dynamic. The test case is to click on the respective Delete button where the name is equal to "Test Group 2". Please suggest C# code. 回答1: Not knowing what is under that fourth td I can't say for sure, but you can find it with an xpath that looks something like this. //td[contains(text(),'Test Group 2')]/..//td[4]//button You might have to specify which button since that edit button will be in the same td. 回答2: You can use the below method. Pass the value

问题 Hi, The table shown in the picture is dynamic. The test case is to click on the respective Delete button where the name is equal to "Test Group 2". Please suggest C# code. 回答1: Not knowing what is under that fourth td I can't say for sure, but you can find it with an xpath that looks something like this. //td[contains(text(),'Test Group 2')]/..//td[4]//button You might have to specify which button since that edit button will be in the same td. 回答2: You can use the below method. Pass the value

问题 Probably what I am asking is impossible, but nevertheless here is my problem and question. First of all this is C# and .NET. I would like to define an empty implementation (empty methods, functions returning defaults) of a class to an interface in such a way if I change the interface I will not need to adapt the code. Unfortunately I can not generate the implementation containing assembly and I can not define a dynamical mock on it because instantiation is done automatically via reflection.

问题 I want to create a code that can iterate over a dynamic number (N) of nested loops each with different range. For example: N=3 ranges=[[-3, -2, -1, 0, 1, 2, 3], [-5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5], [-3, -2, -1, 0, 1, 2, 3]] for x in ranges[0]: for y in ranges[1]: for z in range[2]: variable=[x, y, z] Im new to python. As I went over similar questions posted here I have the understanding that this can be done with recursion or itertools. However, none of the answers posted solve this

问题 I want to know how to dynamically change an $http call so that the $http request URL differs based on the element that is clicked in an ng-repeat list. But I'm stuck. Currently, I have an ng-repeat set up on my index page: <div ng-repeat="team in nt.getStandings"> <a href="#/nation-details/{{team.team_id}}"><h2>{{team.team_name}}</h2></a> <p>Team ID = {{team.team_id}}</p> </div> The variable getStandings is taken from an API via an $http call. Like so: In StandingsService return $http.get(

问题 Suppose I have 2 classes ........ A Class is base class and class B is derived class and if i create a reference such as : A a=new B(); does it mean that reference a points to object of B Class ? If yes than how am i able to call overridden methods of A in B and not other methods of B ? thank you in advance class A { m1() { } } class B extends A { m1() { } m2() { } } A a=new B(); a.m1(); //it will call overridden m1() in B a.m2(); //it doesnt work if reference "a" points to object of B than

问题 Good Morning; Actually have 2 questions. My first is what is this called? A Program? A Module? WhatIsThisCalled() { //workToBeDone } I'm trying to create dynamic checkbox(s) from each entry in a text file. I'm trying to reuse the code so I have tried to create the module in a logic file. I feel like I've done this correctly, but I can't test it. I can not figure out how to reference this.Controls.Add(chk[I]); to the winForm I want to call it on. The error I get is about it being illegal in a