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Best way to select random rows PostgreSQL
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Given your specifications (plus additional info in the comments),
You have a numeric ID column (integer numbers) with only few (or moderately few) gaps.
Obviously no or few write operations.
Your ID column has to be indexed! A primary key serves nicely.
The query below does n...
Retrieve specific commit from a remote Git repository
Is there any way to retrieve only one specific commit from a remote Git repo without cloning it on my PC? The structure of remote repo is absolutely same as that of mine and hence there won't be any conflicts but I have no idea how to do this and I don't want to clone that huge repository.
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What is PECS (Producer Extends Consumer Super)?
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What should be in my .gitignore for an Android Studio project?
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Updated to Android Studio 3.0
Please share missing items in comments.
A late answer but none of the answers here and here was right on the money for us...
So, here's our gitignore file:
#built application files
*.apk
*.ap_
# files for the dex VM
*.dex
# Java class files
*.class
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Recursion in Angular directives
...a couple of popular recursive angular directive Q&A's out there, which all come down to one of the following solutions:
9 A...
Logical operators for boolean indexing in Pandas
...== (1 & a['y']) == 10 which would in turn be equivalent to the chained comparison (a['x'] == (1 & a['y'])) and ((1 & a['y']) == 10). That is an expression of the form Series and Series.
The use of and with two Series would again trigger the same ValueError as above. That's why the parent...
Modify request parameter with servlet filter
...If you try to pass anything else to doFilter, some servlet containers will complain that you have violated the spec, and will refuse to handle it.
A more elegant solution is more work - modify the original servlet/JSP that processes the parameter, so that it expects a request attribute instead of a...
class
...SO provides the ability to upvote edits; oh well). That indeed is the more common use of class << self, to create class/module methods. I will probably expand on that use of class << self, as that is a much more idiomatic use.
– Chris Jester-Young
M...
Why are C# interface methods not declared abstract or virtual?
...Interface { }
If Base and Derived are declared in the same assembly, the compiler will make Base::Method virtual and sealed (in the CIL), even though Base doesn't implement the interface.
If Base and Derived are in different assemblies, when compiling the Derived assembly, the compiler won't cha...
rails - Devise - Handling - devise_error_messages
...e this out myself. I just found this issue logged on Github https://github.com/plataformatec/devise/issues/issue/504/#comment_574788
Jose is saying that devise_error_messsages! method is just a stub (though it contains implementation) and that we're supposed to override/replace it. It would have be...