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Performance of foreach, array_map with lambda and array_map with static function

What's the performance difference (if there is any) between these three approaches, both used to transform an array to another array? ...
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Can I invoke an instance method on a Ruby module without including it?

I have a module which declares a number of instance methods 10 Answers 10 ...
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jquery $(window).width() and $(window).height() return different values when viewport has not been r

I am writing a site using jquery that repeatedly calls $(window).width() and $(window).height() to position and size elements based on the viewport size. ...
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Node.js or Erlang

I really like these tools when it comes to the concurrency level it can handle. 9 Answers ...
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What is the fastest way to create a checksum for large files in C#

I have to sync large files across some machines. The files can be up to 6GB in size. The sync will be done manually every few weeks. I cant take the filename into consideration because they can change anytime. ...
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Calculate size of Object in Java [duplicate]

I want to record how much memory (in bytes, hopefully) an object takes up for a project (I'm comparing sizes of data structures) and it seems like there is no method to do this in Java. Supposedly, C/C++ has sizeOf() method, but this is nonexistant in Java. I tried recording the free memory in the...
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https connection using CURL from command line

I am new to Curl and Cacerts world and facing a problem while connecting to a server. Basically, I need to test connectivity over https from one machine to another machine. I have a URL to which I need to connect from Machine A (a linux machine) I tried this on command prompt ...
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Log4net does not write the log in the log file

I have created a simple scenario using Log4net, but it seems that my log appenders do not work because the messages are not added to the log file. ...
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How should you build your database from source control?

There has been some discussion on the SO community wiki about whether database objects should be version controlled. However, I haven't seen much discussion about the best-practices for creating a build-automation process for database objects. ...
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Nested fragments disappear during transition animation

Here's the scenario: Activity contains fragment A , which in turn uses getChildFragmentManager() to add fragments A1 and A2 in its onCreate like so: ...