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How to decide when to use Node.js?

... You did a great job of summarizing what's awesome about Node.js. My feeling is that Node.js is especially suited for applications where you'd like to maintain a persistent connection from the browser back to the server. Using a technique known as "long-polling...
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Is !important bad for performance?

...the performance impact there to be nil. Parsers are fast. The question is, what about during rendering, when the browser searches for CSS declarations matching a particular element? Is the common case where there are no !important rules specially optimized? I don't think so, but it is hard to be sur...
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How does the Google “Did you mean?” Algorithm work?

...this: 1) You write a ( misspelled ) word in google 2) You don't find what you wanted ( don't click on any results ) 3) You realize you misspelled the word so you rewrite the word in the search box. 4) You find what you want ( you click in the first links ) This pattern multiplied millions...
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what is Promotional and Feature graphic in Android Market/Play Store?

What does it mean and need whether we are uploading our app into the market? Please Explain or give me a related links. 7 A...
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Take a full page screenshot with Firefox on the command-line

I'm running Firefox on a Xvfb in a VPS. What I want to do is to take a full page screenshot of the page. 6 Answers ...
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What does glLoadIdentity() do in OpenGL?

...They work and I know when to use them, but I don't know why I need them or what they actually do. 6 Answers ...
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Are Java static calls more or less expensive than non-static calls?

... @AaronDigulla -.- what if I told you that I came here because I'm optimizing right now, not prematurely, but when I really need it? You assumed that OP wants to optimize prematurely, but you know that this site is kinda global... Right? I don'...
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What exception classes are in the standard C++ library

What are the exception classes that are included in the standard C++ library, and what should they be used for? I know there are a few new C++11 exceptions, but I'm not sure what they are or where they are. ...
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what is the difference between OLE DB and ODBC data sources?

I was reading a MS Excel help article about pivotcache and wonder what they mean by OLE DB and ODBC sources 11 Answers ...
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What is the difference between gmake and make?

... @Sean What's this about $^? A variable with that name certainly exists in GNU Make, and as far as I can tell is compatible with legacy Make. Are the semantics in BSD Make different? – tripleee ...