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Database sharding vs partitioning
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Partitioning is more a generic term for dividing data across tables or databases. Sharding is one specific type of partitioning, part of what is called horizontal partitioning.
Here you replicate the schema across (typically) multiple instances or servers, usi...
Java - Including variables within strings?
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You can always use String.format(....). i.e.,
String string = String.format("A String %s %2d", aStringVar, anIntVar);
I'm not sure if that is attractive enough for you, but it can be quite handy. The syntax is the same as for printf and java.util....
What is the purpose of @SmallTest, @MediumTest, and @LargeTest annotations in Android?
I'm new to Android and I've seen example code using these annotations. For example:
3 Answers
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Is there a python equivalent of Ruby's 'rvm'?
...th virtualenv burrito.
Update: the correct answer is now probably pyenv.
For scientific computing, the corresponding tool is anaconda.
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Which access modifiers are implied when not specified?
For all of the different concepts that support access modifiers, such as fields, properties, methods and classes, which access modifiers are implied if not specified?
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Inline instantiation of a constant List
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const is for compile-time constants. You could just make it static readonly, but that would only apply to the METRICS variable itself (which should typically be Metrics instead, by .NET naming conventions). It wouldn't make the list i...
How to stop Visual Studio from opening a file on single click?
...avoid the preview tab if you're just clicking it without wanting to see it for whatever reason.
– DomenicDatti
Aug 19 '13 at 12:27
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“Width equals height” constraint in Interface Builder
...will create a constraint where the first and second item is the view.
Before Xcode 5.1
You can't because the width/height editor lacks the fields to relate to another property or set the ratio:
Therefore, you can't express the following code in Interface Builder:
CGFloat ratio = 1.0;
NSLayou...
XPath: How to select nodes which have no attributes?
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Thanks for contributing an answer to Stack Overflow!Please be sure to answer the question. Provide details and share your research!But avoid …Asking for help, clarification, or responding to other answers.Making statements based o...
Rails migrations: self.up and self.down versus change
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For many operations rails can guess what is the inverse operation (without problems). For example, in your case what is the reverse operation of add_column to call when you rollback? Of course it's remove_column. What is the ...