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Should I use Vagrant or Docker for creating an isolated environment? [closed]

...I think Docker is what you want. Vagrant is a virtual machine manager. It allows you to script the virtual machine configuration as well as the provisioning. However, it is still a virtual machine depending on VirtualBox (or others) with a huge overhead. It requires you to have a hard drive file th...
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Matplotlib transparent line plots

... After I plotted all the lines, I was able to set the transparency of all of them as follows: for l in fig_field.gca().lines: l.set_alpha(.7) EDIT: please see Joe's answer in the comments. ...
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Maven: How to include jars, which are not available in reps into a J2EE project?

...o set up your own repository, perhaps this will help. You can use the install-file goal of the maven-install-plugin to install a file to the local repository. If you create a script with a Maven invocation for each file and keep it alongside the jars, you (and anyone else with access) can easily in...
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Using Java with Nvidia GPUs (CUDA)

... First of all, you should be aware of the fact that CUDA will not automagically make computations faster. On the one hand, because GPU programming is an art, and it can be very, very challenging to get it right. On the other hand, beca...
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public friend swap member function

...truct vector { void swap(vector&) { /* swap members */ } }; Naturally, then, our class should too, right? Well, not really. The standard library has all sorts of unnecessary things, and a member swap is one of them. Why? Let's go on. What we should do is identify what's canonical, and w...
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How many bytes does one Unicode character take?

...ing, it defines codepoints and a codepoint is a number, associated with usually a character. I say usually because there are concepts like combining characters. You may be familiar with things like accents, or umlauts. Those can be used with another character, such as an a or a u to create a new log...
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Fragment in ViewPager using FragmentPagerAdapter is blank the second time it is viewed

...r me too. Here is a link. It seems to save the fragment state, which makes all the difference. developer.android.com/reference/android/support/v4/app/… – Tjaart Jan 28 '14 at 12:04 ...
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Declaring an unsigned int in Java

... however, are different. As of Java SE 8, new methods in the Integer class allow you to fully use the int data type to perform unsigned arithmetic: In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of...
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What is the difference between const_iterator and non-const iterator in the C++ STL?

... const_iterators don't allow you to change the values that they point to, regular iterators do. As with all things in C++, always prefer const, unless there's a good reason to use regular iterators (i.e. you want to use the fact that they're not c...
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How to determine if Javascript array contains an object with an attribute that equals a given value?

... You don't need a flag if all you need to know is whether or not "something" is in, you can just check the value of the scan index with the size of array. For this to work the index var needs to be declared before the for statement of course. ...