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vagrant up failed, /dev/vboxnetctl: no such file or directory

... I'm running macOS High Sierra 10.13.1 and VirtualBox 5.2.2. This worked for me: Grant permission to VirtualBox under System Preferences > Security & Privacy > General (this request is new to macOS High Sierra) Open Terminal and run: sudo "/Library/Appl...
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Printing 1 to 1000 without loop or conditionals

... address hence evading the pointer errors. This version of the above in standard C, since it doesn't rely on arithmetic on function pointers: #include <stdio.h> #include <stdlib.h> void f(int j) { static void (*const ft[2])(int) = { f, exit }; printf("%d\n", j); ft[j/1000...
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how to prevent “directory already exists error” in a makefile when using mkdir

I need to generate a directory in my makefile and I would like to not get the "directory already exists error" over and over even though I can easily ignore it. ...
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How can I output a UTF-8 CSV in PHP that Excel will read properly?

...s got to be UTF-8. I open this file in TextEdit or TextMate or Dreamweaver and it displays UTF-8 characters properly, but if I open it in Excel it's doing this silly íÄ kind of thing instead. Here's what I've got at the head of my document: ...
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How do I delete NuGet packages that are not referenced by any project in my solution?

Somehow during the upgrade to VS2012 and .NET 4.5, I've managed to get NuGet confused. There are packages that appear in the package manager (and the packages folder) that I cannot delete (I believe they are legacy ASP.NET NuGet packages that have been replaced with new package names with the new v...
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Why do python lists have pop() but not push()

...ot called list.push given that there's already a list.pop that removes and returns the last element (that indexed at -1) and list.append semantic is consistent with that use? ...
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Increasing (or decreasing) the memory available to R processes

...rror that R has run out of memory. If you have R already installed and subsequently install more RAM, you may have to reinstall R in order to take advantage of the additional capacity. You may also set the amount of available memory manually. Close R, then right-click on your...
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Is System.nanoTime() completely useless?

...ventov's answer offers a more up-to-date perspective. That post is wrong, and nanoTime is safe. There's a comment on the post which links to a blog post by David Holmes, a realtime and concurrency guy at Sun. It says: System.nanoTime() is implemented using the QueryPerformanceCounter/QueryPerfo...
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When to make a type non-movable in C++11?

...x objects. If std::mutex contained a native OS mutex type as a data member and the native type's address must stay fixed (because the OS maintains a list of pointers to its mutexes) then either std::mutex would have to store the native mutex type on the heap so it would stay at the same location whe...
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What is “android.R.layout.simple_list_item_1”?

I've started learning Android development and am following a todolist example from a book: 7 Answers ...