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Hidden Features of MySQL

... years now but have only just recently started to use MySQL with my web applications, and I'm hungry for knowledge. 20 An...
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What is an intuitive explanation of the Expectation Maximization technique? [closed]

Expectation Maximization (EM) is a kind of probabilistic method to classify data. Please correct me if I am wrong if it is not a classifier. ...
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Bidirectional 1 to 1 Dictionary in C#

...;T, S> which is guaranteed to only contain one of each value and key (up to RefEquals anyway), and which can be searched using either key or value. Anyone know of one, or should I just implement it myself? I can't believe that I'm the first person to need this... ...
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How does JavaScript .prototype work?

I'm not that into dynamic programming languages but I've written my fair share of JavaScript code. I never really got my head around this prototype-based programming, does any one know how this works? ...
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How to explore web-based Google Play in another country?

...see the list of top free business applications in your country, use this: https://play.google.com/store/apps/category/BUSINESS/collection/topselling_free Adding gl=ru gives you the list for Russia: https://play.google.com/store/apps/category/BUSINESS/collection/topselling_free?gl=ru Hope this he...
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How can we match a^n b^n with Java regex?

One of the archetypal non- regular languages is: 3 Answers 3 ...
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Why does Windows64 use a different calling convention from all other OSes on x86-64?

AMD has an ABI specification that describes the calling convention to use on x86-64. All OSes follow it, except for Windows which has it's own x86-64 calling convention. Why? ...
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htaccess redirect to https://www

... To first force HTTPS, you must check the correct environment variable %{HTTPS} off, but your rule above then prepends the www. Since you have a second rule to enforce www., don't use it in the first rule. RewriteEngine On RewriteCond %{HTT...
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How to find out if you're using HTTPS without $_SERVER['HTTPS']

I've seen many tutorials online that says you need to check $_SERVER['HTTPS'] if the server is connection is secured with HTTPS. My problem is that on some of the servers I use, $_SERVER['HTTPS'] is an undefined variable that results in an error. Is there another variable I can check that should...
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How can I force users to access my page over HTTPS instead of HTTP?

I've got just one page that I want to force to be accessed as an HTTPS page (PHP on Apache). How do I do this without making the whole directory require HTTPS? Or, if you submit a form to an HTTPS page from an HTTP page, does it send it by HTTPS instead of HTTP? ...