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MySQL, better to insert NULL or empty string?

... some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data? ...
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Node.js on multi-core machines

Node.js looks interesting, BUT I must miss something - isn't Node.js tuned only to run on a single process and thread? 1...
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Use C++ with Cocoa Instead of Objective-C?

... to write applications that use C++ and the Cocoa frameworks because Apple is not making Carbon 64-bit capable. C++ seems to be pretty vanilla in its implementation on Linux and Windows but on Mac OS X it seems like additional Apple specific pieces of code are required (like an Obj-C wrapper). It al...
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Why is using onClick() in HTML a bad practice?

...eard many times that using JavaScript events, such as onClick() , in HTML is a bad practice, because it's not good for semantics. I would like to know what the downsides are and how to fix the following code? ...
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One line if statement not working

I was thinking of something like this? 8 Answers 8 ...
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Singular or plural controller and helper names in Rails

Is there any disadvantage to using singular names for controllers and helpers? Nothing seems to rely on this. It even seems helpers don't have to make the same choice about singular vs. plural as their corresponding controllers, at least according to my limited experimentation. Is that true? ...
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Vim indent xml file

I am learning Vim but I thought this was a simple task but I cannot get it to work. I have browser SO but the solutions are not working for me. ...
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Java: Date from unix timestamp

I need to convert a unix timestamp to a date object. I tried this: 10 Answers 10 ...
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What is the difference between Int and Integer?

In Haskell, what is the difference between an Int and an Integer ? Where is the answer documented? 6 Answers ...
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Determine a user's timezone

Is there a standard way for a web server to be able to determine a user's timezone within a web page? 24 Answers ...