[ad_1] If you want to retrieve only some of the columns then use the following overload: var result = data.GroupBy(key => key.Role, element => element.DocumentType); Otherwise you can also use this projection: var result = data.GroupBy(key => key.Role) .Select(g => new { Role = g.Key, Documents = g.Select(i => i.DocumentType) }); 3 [ad_2] solved How … Read more
[ad_1] From the error message you provided it looks like you need to change the arguments of your operator == function from Myclass & to const Myclass &. [ad_2] solved C++ Constructor and vector, iterator
[ad_1] if the main class inherits from 2 classes with same virtual function but one of them is a pure virtual, will it just use the second one? No. C++ will not assume that you want that behavior. Or something else needs to be done? You must implement the function if you don’t want the … Read more
[ad_1] Page starting an asynchronous operation has to have the Async attribute set to true and an asynchronous operation can only be started on a page prior to PreRenderComplete event. Have you set the Page.Async attribute to true, and are you starting the asynchronous operation before the PreRenderComplete event? In general, you should avoid async … Read more
[ad_1] Look at the below code you mentioned int main(void){ int c; c = getchar(); while (c != EOF) { putchar(c); } return 0; } When c = getchar(); executes & if you provided input as ABC at runtime & press ENTER(\n), that time c holds first character A. Next come to loop, your condition … Read more
[ad_1] An example of how you could do this is: using System; using System.Collections.Generic; public class Program { public static void Main() { bool read = true; List<int> list = new List<int>(); do{ string input = Console.ReadLine(); int x = 0; if(input == “start”) { read = false; } else if(int.TryParse(input, out x)) { list.Add(x); … Read more
[ad_1] You weren’t assigning newnode to newnode->next, therefore no linked list was being created. But your code in the linked list doesn’t break or anything, it prints the values you wanted, just not in a linked list. The problem may be with conio.h, which is of no use in this code. remove #include <conio.h> and … Read more
[ad_1] When Float(const Integer&); is declared, the Integer class has been not declared yet. This should work for what you want: #include <iostream> using namespace std; class Integer; class Float { float x, y; public: Float() : x(0),y(0) {} Float(float a, float b) : x(a),y(b) {} Float(const Integer&); float getX() const { return this->x; } … Read more
[ad_1] Your PrintDetails() method is printing the array without any kind of formatting (hence it’s just printing the array type) use string.Join to print the array delimenated by commas public override void PrintDetails() { Console.WriteLine(“Hi my name is ” + _name + ” and I am studying ” + string.Join(“,”, _subjects)); } ought to do … Read more
[ad_1] As you define void menu(string wrd,int cnt), you must have to call the menu() function passing with two parameters like menu(“code”,10) from main function. You can pass any valid string and int in the menu(). 1 [ad_2] solved C++ Function Calling with Parameter in int main [closed]
[ad_1] From comments: You needed to get the string name of a panel over where the mouse was hovering Attaching a handler to the MouseHover event of a control will cause your code handler to run when the mouse hovers over that control. The control experiencing the hover is passed to the handler as the … Read more
[ad_1] Better way would be: int size = 0; int *aval; printf(“Please enter the size of the array: “); scanf(“%i”, &size); /* Should verify size is reasonable here */ aval = malloc(size * sizeof(*aval)); printf(“\n\nPlease enter array values:\n”); for (i = 0; i < size; i++) { scanf(“%i”, &aval[i]); } Doing it this way creates … Read more
[ad_1] You have an unconditional return 0; after the if statements. All but the first if should be an else if and the code for the correct date should be in an else block. Alternatively, return at the end of every error case, proceeding only if each check passes—although this will lead to a lot … Read more
[ad_1] If you comment these lines: inversi(k)= 1.0 / k; //k che va da 1 a 5 in questo caso quadrati (k)= k*k; //k che va da 1 a 5 in questo caso your code should compile with a simple: g++ -Wall -Wextra my_file.cpp Actually, you can’t assign inexistent variable behind functions. [ad_2] solved ERROR … Read more
[ad_1] Something like that? class CustomObject{ public: CustomObject(int _x) : x(_x) {}; int x; }; struct cmpStruct { bool operator() (const CustomObject* lhs, const CustomObject* rhs) const { return lhs->x > rhs->x; } }; int main(int argc, char* argv[]) { std::set<CustomObject*, cmpStruct> container; CustomObject a(10); CustomObject b(20); CustomObject c(5); container.insert(&a); container.insert(&b); container.insert(&c); for(auto co : … Read more