idioms

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Why cast to Closeable first?

While reading some Java source, I came across this line: ((Closeable) some_obj).close(); some_obj is obviously an instance of a class which implements the Closeable interface. My question is, why d[详细]

2023-01-08 09:08 分类：问答
What kind of polymorphism is considered more idiomatic in C++? [closed]

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references,or expertise, but this question will likely solicit debate, a[详细]

2023-01-05 01:44 分类：问答
What's the most idiomatic Clojure way to write this?

I wrote this function that does this (easier to show than explain): (split 2 (list 1 2 3 4 5 6)) =>((1 2) (2 3) (3 4) (4 5) (5 6))[详细]

2023-01-04 05:56 分类：问答
Why is the recursion idiom in Haskell "'n+1' and 'n'" and not "'n' and 'n-1'"?

I\'m working my way through Graham Hutton\'s Haskell book, and 开发者_StackOverflow中文版in his recursion chapter, he often pattern-matches on \"n+1\", as in:[详细]

2022-12-29 23:45 分类：问答
How to implement an interface class using the non-virtual interface idiom in C++?

In C++ an interface can be implemented by a class whose methods are pure virtual. Such a class could be part of a library to describe what methods an object should implement to be able to work with[详细]

2022-12-28 19:15 分类：问答
How does DATEDIFF calculate week differences in SQL Server 2005?

I would like to calculate the difference in weeks between two dates, where two dates are considered part of the same week if their preceding Sunday is the same. Ideally, I\'d like to do this using DAT[详细]

2022-12-28 11:27 分类：问答
Common idiom in Java to Scala, traverse/Iterate Java list into Scala list

I am processing a XML document and iterating through nodes.I want to iterate through开发者_如何学JAVA the nodes and build a new List of some type.How would I do this with Scala:[详细]

2022-12-28 11:08 分类：问答
Python indentation in "empty lines"

Which is preferred (\".\" indicating whitespace)? A) def foo(): 开发者_开发知识库x = 1 y = 2 .... if True:[详细]

2022-12-28 05:24 分类：问答
Most idiomatic way to print a time difference in Java?

I\'m familiar with printing time difference in milliseconds: long time = System.currentTimeMillis(); //do something that takes some time...[详细]

2022-12-27 20:19 分类：问答
DRY Ruby Initialization with Hash Argument

I find myself using hash arguments to constructors quite a bit, especially when writing DSLs for configuration or other bits of API that the end user will be exposed to. What I end up doing is somethi[详细]

2022-12-27 10:00 分类：问答