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quick random row selection in Postgres
... that contains couple of millions of rows. I have checked on the internet and I found the following
7 Answers
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IOS7 : UIScrollView offset in UINavigationController
I'm currently migrating my app on ios 7 and I've been stuck for hours on the new navigationcontroller/bar management.
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Why is an array not assignable to Iterable?
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Arrays can implement interfaces (Cloneable and java.io.Serializable). So why not Iterable? I guess Iterable forces adding an iterator method, and arrays don't implement methods. char[] doesn't even override toString. Anyway, arrays of references should be considered l...
Processing Symbol Files in Xcode
... so it becomes possible to debug on devices with that specific iOS version and also to symbolicate crash reports that happened on that iOS version.
Since symbols are CPU specific, the above only works if you have imported the symbols not only for a specific iOS device but also for a specific CPU ty...
How does the Comma Operator work
...itializers for symbol tables. Thus, it makes the following syntax possible and meaningful:
keywords = "and", "or", "not", "xor";
Notice that due to operator precedence, the code is (intentionally!) identical to
(((keywords = "and"), "or"), "not"), "xor";
That is, the first operator called is k...
Is there a Java equivalent or methodology for the typedef keyword in C++?
Coming from a C and C++ background, I found judicious use of typedef to be incredibly helpful. Do you know of a way to achieve similar functionality in Java, whether that be a Java mechanism, pattern, or some other effective way you have used?
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Managing large binary files with Git
I am looking for opinions of how to handle large binary files on which my source code (web application) is dependent. We are currently discussing several alternatives:
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How can I get the current screen orientation?
I just want to set some flags when my orientation is in landscape so that when the activity is recreated in onCreate() i can toggle between what to load in portrait vs. landscape. I already have a layout-land xml that is handling my layout.
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How to save a plot as image on the disk?
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There are two closely-related questions, and an answer for each.
1. An image will be generated in future in my script, how do I save it to disk?
To save a plot, you need to do the following:
Open a device, using png(), bmp(), pdf() or similar
Plot your model
C...
How can the Euclidean distance be calculated with NumPy?
...roduction to Data Mining
This works because Euclidean distance is l2 norm and the default value of ord parameter in numpy.linalg.norm is 2.
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