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GLib compile error (ffi.h), but libffi is installed

... If you have a Debian-based Linux OS with apt-get: sudo apt-get install libffi-dev With a Redhat-base OS: yum install libffi-devel With Alpine Linux: apk add libffi-dev share | improve...
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Why is WinRT unmanaged? [closed]

...then, COM became the universal glue in the last half of the 1990s. Practically any language runtime in common use in Windows supports COM. A garbage collector is a language runtime implementation detail. The collector for .NET is very different from the collector for Javascript for example. The ...
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How does '20 seconds' work in Scala?

... There are a few things going on. First, Scala allows dots and parens to be omitted from many method calls, so 20 seconds is equivalent to 20.seconds()*. Second, an "implicit conversion" is applied. Since 20 is an Int and Int has no seconds method, the compiler searches ...
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How to gracefully handle the SIGKILL signal in Java

...uts down in response to two kinds of events: The program exits normally, when the last non-daemon thread exits or when the exit (equivalently, System.exit) method is invoked, or The virtual machine is terminated in response to a user interrupt, such as typing ^C, or a system-wide event, su...
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Recommended date format for REST GET API

... REST doesn't have a recommended date format. Really it boils down to what works best for your end user and your system. Personally, I would want to stick to a standard like you have for ISO 8601 (url encoded). If not having ugly URI is a concern (e.g. not including th...
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What is the difference between a generative and a discriminative algorithm?

...|x) - which you should read as "the probability of y given x". Here's a really simple example. Suppose you have the following data in the form (x,y): (1,0), (1,0), (2,0), (2, 1) p(x,y) is y=0 y=1 ----------- x=1 | 1/2 0 x=2 | 1/4 1/4 p(y|x) is y=0 y=1 -----------...
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How to make a in Bootstrap look like a normal link in nav-tabs?

...around them which messes up the layout. BUT you can fix that by adding a small amount of CSS (see @mcNux answer below) – Martin CR Feb 22 at 17:21 ...
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How do I sort an array of hashes by a value in the hash?

... Actually, Array#sort_by! is new in Ruby 1.9.2. Available today to all Ruby version by requiring my backports gem too :-) – Marc-André Lafortune Jul 1 '10 at 4:19 ...
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What's invokedynamic and how do I use it?

I keep hearing about all the new cool features that are being added to the JVM and one of those cool features is invokedynamic. I would like to know what it is and how does it make reflective programming in Java easier or better? ...
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How do I launch the Android emulator from the command line?

...h it, but you don't have any AVDs created and have to use command line for all the actions. You have to do the following. Create a new virtual device (AVD) for the platform you need. If you have to use command line for creating your AVD, you can call android create avd -n <name> -t <targe...