generic-programming

问题 In Rust, is there any way to use trait s and impl s to (recursively) flatten tuples? If it helps, something that works with N nested pairs is a good start trait FlattenTuple { fn into_flattened(self) -> /* ??? */ } // such that assert_eq!((1, (2, 3)).into_flattened(), (1, 2, 3)) It would be even better if it could be extended work with any kind of nested tuple such that: assert_eq!(((1, 2), 2, (3, (4, 5))).into_flattened(), (1, 2, 2, 3, 4, 5)) 回答1: Maybe for certain small definitions of

问题 I'm trying to build a generic POST controller. I can access params in a generic way but I can't get possible files without using @RequestParam("files") MultipartFile[] files so, does anyone know how to get files (if there are any submitted) in a generic way? This is my controller so far: @PostMapping public void save(@RequestParam MultiValueMap<String, Object> o) { Iterator it = o.keySet().iterator(); while(it.hasNext()){ String key = (String) it.next(); String value = (String) o.getFirst(key

来源： https://stackoverflow.com/questions/63655638/why-cant-i-put-an-object-of-superclass-of-b-into-container-super-b

来源： https://stackoverflow.com/questions/63655638/why-cant-i-put-an-object-of-superclass-of-b-into-container-super-b

来源： https://stackoverflow.com/questions/63655638/why-cant-i-put-an-object-of-superclass-of-b-into-container-super-b

来源： https://stackoverflow.com/questions/55213466/generic-usage-of-diesels-find-or-filter-to-perform-deletions

来源： https://stackoverflow.com/questions/55213466/generic-usage-of-diesels-find-or-filter-to-perform-deletions

来源： https://stackoverflow.com/questions/53369276/dart-cant-call-generics-method

来源： https://stackoverflow.com/questions/53369276/dart-cant-call-generics-method

来源： https://stackoverflow.com/questions/46171843/moving-in-range-based-loop-in-generic-c-code