django templates, find string replace with other string
A shorter version of Matthijs’ answer: {{ user.name.split|join:”_” }} Of course it only works when splitting on whitespace.
templates
Must template argument functions be treated as potentially constexpr?
Introduction template<int F(), int N = F()> void func (); In this answer we will go through the relevant sections of the International Standard, step by step, to prove that the above snippet is well-formed. What does the International Standard (N3337) say? The Standardese 14.1p9 Template parameters [temp.param] A default template-argument is a template-argument (14.3) … Read more
Web Application Templates [closed]
https://github.com/pilu/web-app-theme is absolutely stunning and actively developed. 🙂
How to see how many repos created from my repo template (GitHub)
Eureka! After reading this – Search based on the contents of a repository, the answer was clear! Search by README.md file content! Use GitHub’s search engine and provide a unique combination of words that appear in your README.md file. This is how I do it for my template – unfor19/terraform-multienv in:readme sort:updated -user:unfor19 “tfmultienv”github.com/search?q=in%3Areadme+sort%3Aupdated+-user%3Aunfor19+%22%60tfmultienv%60%22&type=repositories To … Read more
How to mock templated methods using Google Mock?
In previous version of Google Mock you can only mock virtual functions, see the documentation in the project’s page. More recent versions allowed to mock non-virtual methods, using what they call hi-perf dependency injection. As user @congusbongus states in the comment below this answer: Google Mock relies on adding member variables to support method mocking, … Read more
C++: Inherit class from template parameter
It’s often used to realize static polymorphism. Use cases are: Policy-based design Curiously recurring template pattern Barton–Nackman trick In general you have the benefits from dynamic polymorphism, without the extra runtime costs of virtual functions. But it’s only useful if the concrete type can be determined at compile time.
How to get a list of current variables from Jinja 2 template?
Technically, because context is not passed as a named dictionary, a little work is required to generate a list of the context variables from inside a template. It is possible though. Define a Jinja context function to return the jinja2.Context object, which is essentially a dictionary of the global variables/functions Make that function available in … Read more
Can C++ deduce argument type from default value? [duplicate]
The type of a template parameter in a function can’t be deduced from a default argument. As shown in the example on cppreference.com: Type template parameter cannot be deduced from the type of a function default argument: template<typename T> void f(T = 5, T = 7); void g() { f(1); // OK: calls f<int>(1, 7) … Read more
C++ template function compiles in header but not implementation
The problem you’re having is that the compiler doesn’t know which versions of your template to instantiate. When you move the implementation of your function to x.cpp it is in a different translation unit from main.cpp, and main.cpp can’t link to a particular instantiation because it doesn’t exist in that context. This is a well-known … Read more
Do template specialisations belong into the header or source file?
If it is functions you have specialized, you can either put them in the .cpp file, or make them inline in the header. Like James points out, if you don’t make the functions inline, you still have to declare the specializations in the header. Otherwise the compiler doesn’t know it has to look for them … Read more