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What is an NP-complete in computer science?

What is an NP-complete problem? Why is it such an important topic in computer science? 15 Answers ...
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sh: 0: getcwd() failed: No such file or directory on cited drive

... This error is usually caused by running a command from a directory that no longer exist. Try changing your directory and re-run the command. share ...
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NSNotificationCenter addObserver in Swift

...d an observer in Swift to the default notification center? I'm trying to port this line of code that sends a notification when the battery level changes. ...
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Should I make HTML Anchors with 'name' or 'id'?

... According to the HTML 5 specification, 5.9.8 Navigating to a fragment identifier: For HTML documents (and the text/html MIME type), the following processing model must be followed to determine what the indicated part of the ...
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How to go to each directory and execute a command?

How do I write a bash script that goes through each directory inside a parent_directory and executes a command in each directory . ...
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config.assets.compile=true in Rails production, why not?

...oduction. When you have compile on, this is what happens: Every request for a file in /assets is passed to Sprockets. On the first request for each and every asset it is compiled and cached in whatever Rails is using for cache (usually the filesystem). On subsequent requests Sprockets receives th...
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passport.js RESTful auth

How does one handle authentication (local and Facebook, for example) using passport.js, through a RESTful API instead of through a web interface? ...
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How to detect internet speed in JavaScript?

..."string") { console.log(msg); } else { for (var i = 0; i < msg.length; i++) { console.log(msg[i]); } } } var oProgress = document.getElementById("progress"); if (oProgress) { var actualHTML = (...
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“No such file or directory” error when executing a binary

...4. The app shipped with an old version of gzip (1.2.4), that was compiled for a much older kernel: 8 Answers ...
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How can I get color-int from color resource?

Is there any way to get a color-int from a color resource? 12 Answers 12 ...