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Equation for testing if a point is inside a circle

If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle? ...
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Port 80 is being used by SYSTEM (PID 4), what is that?

...P adress is 0.0.0.0, state = LISTENING: means that port 80 is listening to all interfaces (not used) How to read NETSTAT -AN results: https://sites.google.com/site/xiangyangsite/home/technical-tips/linux-unix/networks-related-commands-on-linux/how-to-read-netstat--an-results ...
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How to copy files across computers using SSH and MAC OS X Terminal [closed]

...compression use SCP: scp username@yourserver.com:~/serverpath/public_html ~/Desktop share | improve this answer | follow | ...
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How to get a list of all files that changed between two Git commits?

Due to bureaucracy, I need to get a list of all changed files in my repository for a report (I started with existing source code). ...
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How to base64 encode image in linux bash / shell

... You need to use cat to get the contents of the file named 'DSC_0251.JPG', rather than the filename itself. test="$(cat DSC_0251.JPG | base64)" However, base64 can read from the file itself: test=$( base64 DSC_0251.JPG ) ...
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Do zombies exist … in .NET?

I was having a discussion with a teammate about locking in .NET. He's a really bright guy with an extensive background in both lower-level and higher-level programming, but his experience with lower level programming far exceeds mine. Anyway, He argued that .NET locking should be avoided on critic...
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How do I create 7-Zip archives with .NET?

... If you can guarantee the 7-zip app will be installed (and in the path) on all target machines, you can offload by calling the command line app 7z. Not the most elegant solution but it is the least work. ...
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What do 'real', 'user' and 'sys' mean in the output of time(1)?

... time; User and Sys refer to CPU time used only by the process. Real is wall clock time - time from start to finish of the call. This is all elapsed time including time slices used by other processes and time the process spends blocked (for example if it is waiting for I/O to complete). User is t...
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parsing JSONP $http.jsonp() response in angular.js

... UPDATE: since Angular 1.6 You can no longer use the JSON_CALLBACK string as a placeholder for specifying where the callback parameter value should go You must now define the callback like so: $http.jsonp('some/trusted/url', {jsonpCallbackParam: 'callback'}) Change/access/decla...
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How to pattern match using regular expression in Scala?

...ter match { case Pattern(c) => c bound to capture group here case _ => } share | improve this answer | follow | ...