namespaces

问题 It's surely a noobish problem, I'm sorry for wasting your time, but I can't find any solution (I searched a bit on the internet, but found nothing). I have a Console Application Project in Visual Studio 2013 and I have many folders where I put various .h and .cpp files. In these files I use namespaces for grouping classes. The problem is that I can't include headers that are in parent directories in the current .cpp or .h file. For example, I have a Hello class under the path /a/b/c, that is

问题 It's surely a noobish problem, I'm sorry for wasting your time, but I can't find any solution (I searched a bit on the internet, but found nothing). I have a Console Application Project in Visual Studio 2013 and I have many folders where I put various .h and .cpp files. In these files I use namespaces for grouping classes. The problem is that I can't include headers that are in parent directories in the current .cpp or .h file. For example, I have a Hello class under the path /a/b/c, that is

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 days ago . I have this error: 'someFunction' is not an exported object from 'namespace:somePackage' Does anyone know how to solve it? 回答1: Some reasons: Function is not part of the package, anymore, try ??someFunction to find out which package it belongs to. Package data is not part of the package Function is available in

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 days ago . I have this error: 'someFunction' is not an exported object from 'namespace:somePackage' Does anyone know how to solve it? 回答1: Some reasons: Function is not part of the package, anymore, try ??someFunction to find out which package it belongs to. Package data is not part of the package Function is available in

问题 I have been trying to understand the chapter Namespaces and dynamic language features from php.net manual. Please consider the following code: namespace Foo; function strstr() { echo "My local ststr method called"; } $a = 'strstr'; $a(); //This would call the global strstr method As per the manual, I have to go $a = 'Foo\strstr' , but I can't find a reason for this. Why can't php interpreter at runtime know that $a = 'strstr'; was defined in the context of namespace Foo , just like executing

问题 I follow the docs: http://laravel.com/docs/master/migrations#database-seeding I placed UserTableSeeder file near DatabaseSeeder . In resources/database/seeds/ folder. These files are without namespaces (only classes in app/ are namespaced). Of course there is an exception: exception 'ReflectionException' with message 'Class UserTableSeeder does not exist' What is the best way to solve this problem? 回答1: The default Laravel 5 project has a classmap defined in its composer.json : { // ...

问题 I have the following code: typedef struct Y {int X;} X; enum E {X}; which generates a error: error: 'X' redeclared as different kind of symbol As I know, C has implicitly defined namespaces for structure, union, and enum tags and also for their members. So, I'm not sure why does E::X collide with typedef structure tag X ? What exactly are name spaces in C? 回答1: C does not have a separate namespace for enum members. When you write enum {X} , that creates a global constant X (which can clash

问题 I have the following code: typedef struct Y {int X;} X; enum E {X}; which generates a error: error: 'X' redeclared as different kind of symbol As I know, C has implicitly defined namespaces for structure, union, and enum tags and also for their members. So, I'm not sure why does E::X collide with typedef structure tag X ? What exactly are name spaces in C? 回答1: C does not have a separate namespace for enum members. When you write enum {X} , that creates a global constant X (which can clash

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . If you want to rename your app folder this is just one of several ways to go about it. 1) run php artisan app:name YourNamespace 2) rename your app folder to YourNamespace 3) in your bootstrap folder create a file called application.php 4) paste this in there class Application extends Illuminate

问题 I'm writing a function that uses an external data as follow: First, it checks if the data is on the data / folder, if it is not, it creates the data / folder and then downloads the file from github; If the data is already on the data/ folder, it reads it, and perform the calculations. The question is, when I run: devtools::check() it returns: Error: 'data' is not an exported object from 'namespace:my_package' Should I manually put something on NAMESPACE ? An example: my_function <- function(x