reference

问题 Garbage collectors have functionality to deal with reference cycles. As far, as I understand, this is necessary for all languages with GC. But I do not understand, why there can not be created language avoiding reference cycles, using some weak references, if necessary. What are the real life examples of unavoidable reference cycles, arising in programming? 回答1: You can not create a programming language avoiding reference cycles, as it would be the responsibility of the application programmer

问题 Garbage collectors have functionality to deal with reference cycles. As far, as I understand, this is necessary for all languages with GC. But I do not understand, why there can not be created language avoiding reference cycles, using some weak references, if necessary. What are the real life examples of unavoidable reference cycles, arising in programming? 回答1: You can not create a programming language avoiding reference cycles, as it would be the responsibility of the application programmer

问题 This may sound like a silly question, but I was confused about this following behaviour: void funcTakingRef(unsigned int& arg) { std::cout << arg; } void funcTakingByValue(unsigned int arg) { std::cout << arg; } int main() { int a = 7; funcTakingByValue(a); // Works funcTakingRef(a); // A reference of type "unsigned int &" (not const-qualified) // cannot be initialized with a value of type "int" } After thinking about it this kind of makes sense because in passing by value a new variable is

问题 I wanted to use two different version same library (OpenCVSharp 2.x and OpenCVSharp 3.x) Well i downloaded those two packages both to the separate project (lets call it OCV2Wrapper and OCV3Wrapper) and reference both wrappers in my project. I had to renamed libraries from one package (2.x) and reference them manualy because: Can we add 2 different versions of same package in NuGet. I read about external aliases and I used external alias in one of the wrappers (2.x in my case). But I have some

问题 I wanted to use two different version same library (OpenCVSharp 2.x and OpenCVSharp 3.x) Well i downloaded those two packages both to the separate project (lets call it OCV2Wrapper and OCV3Wrapper) and reference both wrappers in my project. I had to renamed libraries from one package (2.x) and reference them manualy because: Can we add 2 different versions of same package in NuGet. I read about external aliases and I used external alias in one of the wrappers (2.x in my case). But I have some

问题 I wanted to use two different version same library (OpenCVSharp 2.x and OpenCVSharp 3.x) Well i downloaded those two packages both to the separate project (lets call it OCV2Wrapper and OCV3Wrapper) and reference both wrappers in my project. I had to renamed libraries from one package (2.x) and reference them manualy because: Can we add 2 different versions of same package in NuGet. I read about external aliases and I used external alias in one of the wrappers (2.x in my case). But I have some

问题 Hi I know this has been asked but it did not get an answer. I have a problem when I want to use a dll that is installed on C:\Program files (x86)\Dummu_API.dll When I run my app it throws exception: Could not load file or assembly 'Dummy_API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. My project have the reference as Copy Local = false and specific version = false. My project also is a x86 platform target. I

问题 Hi I know this has been asked but it did not get an answer. I have a problem when I want to use a dll that is installed on C:\Program files (x86)\Dummu_API.dll When I run my app it throws exception: Could not load file or assembly 'Dummy_API, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. My project have the reference as Copy Local = false and specific version = false. My project also is a x86 platform target. I

问题 I have a .NET Core solution in visual studio 2017 that is building against the .NET 4.7 framework. In the main web application there is a dependencies menu that breaks down references into logical categories (Analyzers, Assemblies, NuGet, Projects). In the helper project it only has a references menu with everything jumbled inside. Is there a way to get the same treatment here as the web application got? 回答1: It's based on the project file type. The older Full Framework project file gives you

问题 As I understand, mutability is not reflected in variables type signature. For example, these two references have the same type signature &i32 : let ref_foo : &i32 = &foo; let mut ref_bar : &i32 = &bar; Why is this the case? It seems like a pretty major oversight. I mean, even C/C++ does this more explictly with having two const to indicate that we have a const pointer to const data: const int * const ptr_foo = &foo; const int * ptr_bar = &bar; Is there a better way of thinking about this? 回答1