idiomatic

问题 I have something similar to this: mod private { // My crate pub struct A; impl A { pub fn new() -> Self { Self } // ... } } fn main() { // External code let obj = private::A::new(); let obj2 = private::A; } Currently, A doesn't need to store any internal state to do what I want it to (it's just being used as a placeholder in an enum), so I made it a zero-sized struct. However, that might change in the future, so I want to prevent code outside this crate from instantiating A without going

问题 I have something similar to this: mod private { // My crate pub struct A; impl A { pub fn new() -> Self { Self } // ... } } fn main() { // External code let obj = private::A::new(); let obj2 = private::A; } Currently, A doesn't need to store any internal state to do what I want it to (it's just being used as a placeholder in an enum), so I made it a zero-sized struct. However, that might change in the future, so I want to prevent code outside this crate from instantiating A without going

来源： https://stackoverflow.com/questions/63596587/generating-finite-lists-of-primes-in-haskell

来源： https://stackoverflow.com/questions/63596587/generating-finite-lists-of-primes-in-haskell

问题 I inherited responsibility for a REST service written in Java using Spring and associated libraries including Reactor. For expensive operations like REST calls out or database operations the code is extensively wrapping the results in Reactor Mono. There are all sorts of things that need to be addressed in the code but one that keeps showing up is nested flatMap s over Mono s for sequences of expensive operations that end up up indented several levels deep into an unreadable mess. I find it

问题 I inherited responsibility for a REST service written in Java using Spring and associated libraries including Reactor. For expensive operations like REST calls out or database operations the code is extensively wrapping the results in Reactor Mono. There are all sorts of things that need to be addressed in the code but one that keeps showing up is nested flatMap s over Mono s for sequences of expensive operations that end up up indented several levels deep into an unreadable mess. I find it

问题 Many developers and library authors have been struggling with compile-time strings for quite a few years now - as the standard (library) string, std::string , requires dynamic memory allocation, and isn't constexpr. So we have a bunch of questions and blog posts about how to get compile-time strings right: Conveniently Declaring Compile-Time Strings in C++ Concatenate compile-time strings in a template at compile time? C++ Compile-Time string manipulation (off-site) Compile-time strings with

问题 Many developers and library authors have been struggling with compile-time strings for quite a few years now - as the standard (library) string, std::string , requires dynamic memory allocation, and isn't constexpr. So we have a bunch of questions and blog posts about how to get compile-time strings right: Conveniently Declaring Compile-Time Strings in C++ Concatenate compile-time strings in a template at compile time? C++ Compile-Time string manipulation (off-site) Compile-time strings with

问题 Many developers and library authors have been struggling with compile-time strings for quite a few years now - as the standard (library) string, std::string , requires dynamic memory allocation, and isn't constexpr. So we have a bunch of questions and blog posts about how to get compile-time strings right: Conveniently Declaring Compile-Time Strings in C++ Concatenate compile-time strings in a template at compile time? C++ Compile-Time string manipulation (off-site) Compile-time strings with

问题 To create all possible combinations of two sets of parameters and perform an action on them, you can do: setOf(foo, bar, baz).forEach { a -> setOf(0, 1).forEach { b -> /* use a and b */ } } However, if you have (potentially many) more parameters, this quickly turns into a pyramid of doom: setOf(foo, bar, baz).forEach { a -> setOf(0, 1).forEach { b -> setOf(true, false, null).forEach { c -> setOf("Hello,", "World!").forEach { d -> /* use a, b, c and d */ } } } } You could write this similarly