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Find MongoDB records where array field is not empty
... that index is utilized during the query, you will get unexpected results. For example: db.doc.find({'nums': { $gt: [] }}).hint({ _id: 1 }).count() returns the right number, while db.doc.find({'nums': { $gt: [] }}).hint({ nums: 1 }).count() returns 0.
– wojcikstefan
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Is there an equivalent to CTRL+C in IPython Notebook in Firefox to break cells that are running?
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Unfortunately it seems that the browser can become so unresponsive, that it is hard to reach the server page.
– K.-Michael Aye
Dec 15 '14 at 1:56
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Does order of where clauses matter in SQL?
... strategies.
What does matter is whether or not you have a suitable index for this!
In the case of SQL Server, it will likely use an index if you have:
an index on (LastName, FirstName)
an index on (FirstName, LastName)
an index on just (LastName), or just (FirstName) (or both)
On the other ha...
Stop setInterval
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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...
What is the difference between Unidirectional and Bidirectional JPA and Hibernate associations?
... directions.
Note that navigational access is not always good, especially for "one-to-very-many" and "many-to-very-many" relationships. Imagine a Group that contains thousands of Users:
How would you access them? With so many Users, you usually need to apply some filtering and/or pagination, so t...
How to delete images from a private docker registry?
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Currently you cannot use the Registry API for that task. It only allows you to delete a repository or a specific tag.
In general, deleting a repository means, that all the tags associated to this repo are deleted.
Deleting a tag means, that the association between ...
Is there a quicker / better way to clear the iPhone Simulator cache than deleting its directory?
...e all
Safe and effective.
See https://stackoverflow.com/a/26394597/218152 for single device
xcrun simctl erase [device ID]
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How to change a span to look like a pre with CSS?
Is it possible to to change a <span> tag (or <div> ) to preformat its contents like a <pre> tag would using only CSS?
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What are fail-safe & fail-fast Iterators in Java
...aggressively so that the failure condition is (where possible1) detected before too much damage can be done. In Java, a fail-fast iterator fails by throwing a ConcurrentModificationException.
The alternative to "fail-fast" and "weakly consistent" is semantic where the iteration fails unpredictably...
'parent.relativePath' points at my com.mycompany:MyProject instead of org.apache:apache - Why?
...gt;
</parent>
Here is the relevant doc.
This feature is only for enhancing the development in a local checkout of that project. Set the value to an empty string in case you want to disable the feature and always resolve the parent POM from the repositories.
Default value is: ../pom.x...