idioms

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Can I avoid referencing + dereferencing the hash returned from a map operation?

I\'ve got an array of hashes. I want the a list of the values in a key of those hash开发者_Python百科es based on the uniqueness of another key.[详细]

2023-02-22 02:29 分类：问答
In Python, is there a clean way to return the value of a function if it's not None?

I find myself writing a lot of code that resembles the following: ans = call_function() if ans: return ans[详细]

2023-02-21 11:19 分类：问答
What's the point of a copied / duplicate reference variable?

I just saw the following code: public static void initElements(WebDriver driver, Object page) { final WebDriver driverRef = driver;[详细]

2023-02-19 22:07 分类：问答
clojure functions, let & return values

Is it unwise to return a var bound using let? (let [pipeline (Channels/pipeline)] (.addLast pipeline \"codec\" (HttpClientCodec.))[详细]

2023-02-19 12:50 分类：问答
Is returning a reference for accessor idiomatic?

In C++, it is possible to create an accessor which returns a reference to a p开发者_运维知识库rivate field.[详细]

2023-02-16 07:20 分类：问答
How do I make this more idiomatic?

So here is a function I translated from another language (Lisp), mostly verbatim-ish. It doesn\'t smell quite right to me though, what with using ref, if without else, etc. How would you rewrite开发者[详细]

2023-02-15 16:06 分类：问答
idiomatic C for const double-pointers

I am aware that in C you can\'t implicitly convert, for instance, char** to const char** (c.f. C-Faq, SO question 1, SO Question 2).[详细]

2023-02-15 08:19 分类：问答
Open and closed union types in Ocaml

I\'m looking into OCaml for the first time, having a bit of background with F# and Haskell. As such, a开发者_StackOverflow lot is familiar-looking, but one thing that isn\'t is the concept of \"open\"[详细]

2023-02-13 22:02 分类：问答
How to implement the factory method pattern in C++ correctly

There\'s this one thing in C++ which has been making me feel uncomfortable for quite a long time, because I honestly don\'t know how to do it, even though it sounds simple:[详细]

2023-02-13 06:25 分类：问答
Traits and passing traits as template parameters

When is it practical to pass traits as template parameters rather than simply using some existing traits struct like[详细]

2023-02-09 18:01 分类：问答