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Make virtualenv inherit specific packages from your global site-packages

...ch will contain just some libraries (which i chose) of the base python installation. 4 Answers ...
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CSS Background Opacity [duplicate]

... It's not really correct to say that "Children inherit opacity". They don't. It's just that if a child is contained in a parent with opacity, the child will have opacity: 1, but the parent applies it's opacity to itself including all it'...
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dyld: Library not loaded … Reason: Image not found

... Find all the boost libraries: $ otool -L exefile exefile: @executable_path/libboost_something.dylib (compatibility version 0.7.0, current version 0.7.0) /usr/lib/libc++.1.dylib (compatibility version 1.0.0, curren...
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Apache Spark: The number of cores vs. the number of executors

... To hopefully make all of this a little more concrete, here’s a worked example of configuring a Spark app to use as much of the cluster as possible: Imagine a cluster with six nodes running NodeManagers, each equipped with 16 cores and 64GB o...
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What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?

...ey are exact representations of the image. Bitmap formats such as BMP generally are uncompressed, although there also are compressed BMP files as well. Lossy compression formats are generally suited for photographs. It is not suited for illustrations, drawings and text, as compression artifacts fro...
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Android SharedPreference security

... within the app's data directory with filesystem permissions set that only allow the UID that the specific application runs with to access them. So, they are private in so much as Linux file permissions restrict access to them, the same as on any Linux/Unix system. Anyone with root level access to ...
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How do I drag and drop files into an application?

...orm1 : Form { public Form1() { InitializeComponent(); this.AllowDrop = true; this.DragEnter += new DragEventHandler(Form1_DragEnter); this.DragDrop += new DragEventHandler(Form1_DragDrop); } void Form1_DragEnter(object sender, DragEventArgs e) { if (e.Data....
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Application Loader: “Cannot proceed with delivery: an existing transporter instance is currently upl

... Basically, you need to clear out the transport tokens. This can happen if you were to close out of Xcode while in the middle of submitting an app to iTunes Connect. The token files now appear in the Library/Caches/com.apple.amp.i...
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Can a foreign key be NULL and/or duplicate?

...at field must exist first in a different table (the parent table). That is all an FK is by definition. Null by definition is not a value. Null means that we do not yet know what the value is. Let me give you a real life example. Suppose you have a database that stores sales proposals. Suppose furth...
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Object.getOwnPropertyNames vs Object.keys

... There is a little difference. Object.getOwnPropertyNames(a) returns all own properties of the object a. Object.keys(a) returns all enumerable own properties. It means that if you define your object properties without making some of them enumerable: false these two methods will give you the sa...