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When to use DataContract and DataMember attributes?
...about the DataContract attribute in WCF. As per my knowledge it is used for serializating user defined type like classes. I wrote one class which is exposed at client side like this.
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Best practice to validate null and empty collection in Java
...ty and MapUtils.isEmpty() methods which respectively check if a collection or a map is empty or null (i.e. they are "null-safe").
The code behind these methods is more or less what user @icza has written in his answer.
Regardless of what you do, remember that the less code you write, the less code...
Insert a line at specific line number with sed or awk
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Yes, the -i switch is specific for GNU-sed.
– user unknown
Dec 21 '12 at 6:39
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comparing sbt and Gradle [closed]
...py with Gradle in java/groovy projects, and I know there's a scala plugin for Gradle.
5 Answers
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Why is it impossible to override a getter-only property and add a setter? [closed]
...y declared that Bar has to be a read-only property. It doesn't make sense for derivations to break this contract and make it read-write.
I'm with Microsoft on this one.
Let's say I'm a new programmer who has been told to code against the Baseclass derivation. i write something that assumes that Bar...
How to find the 'sizeof' (a pointer pointing to an array)?
...trick is the one mentioned by Zan, which is to stash the size somewhere. For example, if you're dynamically allocating the array, allocate a block one int bigger than the one you need, stash the size in the first int, and return ptr+1 as the pointer to the array. When you need the size, decrement ...
Why does the C++ STL not provide any “tree” containers?
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There are two reasons you could want to use a tree:
You want to mirror the problem using a tree-like structure:
For this we have boost graph library
Or you want a container that has tree like access characteristics
For this we have
std::map (and std::multimap)
std::set (and std::multiset)
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PHP: How to send HTTP response code?
... make responses with HTTP response codes (status-codes), like HTTP 200 OK, or some 4XX or 5XX code.
9 Answers
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What should go into an .h file?
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Header files (.h) are designed to provide the information that will be needed in multiple files. Things like class declarations, function prototypes, and enumerations typically go in header files. In a word, "definitions".
Code files (.cpp) are designed to provide the impl...
How the single threaded non blocking IO model works in Node.js
...er, but I'm interested in how the single threaded non blocking IO model works.
After I read the article understanding-the-node-js-event-loop , I'm really confused about it.
It gave an example for the model:
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