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What is the difference between IEnumerator and IEnumerable? [duplicate]

What are the differences between IEnumerator and IEnumerable? 4 Answers 4 ...
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When is it better to use String.Format vs string concatenation?

...the performance hit, but to be honest it'll be minimal if present at all - and this concatenation version doesn't need to parse the format string. Format strings are great for purposes of localisation etc, but in a case like this concatenation is simpler and works just as well. With C# 6 String i...
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Multiple RunWith Statements in jUnit

I write unit test and want to use JUnitParamsRunner and MockitoJUnitRunner for one test class. 8 Answers ...
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What is this operator in MySQL?

I'm working on code written by a previous developer and in a query it says, 9 Answers ...
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Database Design for Tagging

... About ANDing: It sounds like you are looking for the "relational division" operation. This article covers relational division in concise and yet comprehendible way. About performance: A bitmap-based approach intuitively sounds lik...
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How do I debug an MPI program?

I have an MPI program which compiles and runs, but I would like to step through it to make sure nothing bizarre is happening. Ideally, I would like a simple way to attach GDB to any particular process, but I'm not really sure whether that's possible or how to do it. An alternative would be having ea...
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JSF backing bean structure (best practices)

...et people's opinions on best practices for the interface between JSF pages and backing beans. 6 Answers ...
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Is it valid to define functions in JSON results?

...int) String (double-quoted Unicode with backslash escaping) Boolean (true and false) Array (an ordered sequence of values, comma-separated and enclosed in square brackets) Object (collection of key:value pairs, comma-separated and enclosed in curly braces) null ...
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Is there a way to make AngularJS load partials in the beginning and not at when needed?

...here. But I want to load from a url. – Ranjith Ramachandra Sep 11 '12 at 6:54 ...
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Apache Commons equals/hashCode builder [closed]

... The commons/lang builders are great and I have been using them for years without noticeable performance overhead (with and without hibernate). But as Alain writes, the Guava way is even nicer: Here's a sample Bean: public class Bean{ private String name;...