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Do I need to create indexes on foreign keys on Oracle?
...que indexes if one or more columns are nullable. Therefore, if a column or set of columns has a UNIQUE, PRIMARY KEY, or FOREIGN KEY constraint on it, you do not need to create an index on those columns for performance.
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How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
...//www.ruby-doc.org/core/classes/Array.html
Further documentation look at "Set Union"
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How do I configure Maven for offline development?
...Open Source. This is what we use in our organization, it is really easy to setup.
Artifactory acts as a proxy between your build tool (Maven, Ant, Ivy, Gradle etc.) and the outside world.
It caches remote artifacts so that you don’t have to download them over and over again.
It blocks unwanted (a...
Unzip files programmatically in .net
...nderstand example. Just tried it today and I can't believe how simple the setup was. It worked on first try, no errors, no nothing.
https://github.com/jaime-olivares/zipstorer
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What is the point of interfaces in PHP?
...sign by contract" whereby your code is agreeing to respond to a prescribed set of API calls that may be coming from code you do not have aceess to.
While inheritance from abstract class is a "is a" relation, that isn't always what you want, and implementing an interface is more of a "acts like a" r...
Can I use break to exit multiple nested 'for' loops?
...lue that you use. At the end of each loop check the flag value. If it is set to true, then you can break out of that iteration.
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google mock分享（全网最全最好的gmock文档，没有之一） - C/C++ - 清泛网 ...
... MOCK_METHOD0(getArbitraryString, std::string());
MOCK_METHOD1(setValue, void(std::string& value));
MOCK_METHOD2(setDoubleValues, void(int x, int y));
};
} // namespace seamless
#endif // MOCKFOO_H_
FooMain.h
#include <cstdlib>
#include <gmock/gmock.h>
#inc...
How to tag an older commit in Git?
We are new to git, and I want to set a tag at the beginning of our repository.
Our production code is the same as the beginning repository, but we've made commits since then.
A tag at the beginning would allow us to "roll back" production to a known, stable state.
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Cleaning up the iPhone simulator
...subscriptions. On a real device, you can remove a calendar subscription in Settings > Accounts but this menu does not exist on iOS Simulator and I did not want to reset the whole simulator. So I ended up locally versioning my Device folder with git and perform a git reset HEAD --hard && g...
Is there a max array length limit in C++?
... but rather by the hardware.
The first limit (should never be reached) is set by the restrictions of the size type used to describe an index in the array (and the size thereof). It is given by the maximum value the system's std::size_t can take. This data type is large enough to contain the size in...