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How to query as GROUP BY in django?
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What does inverse_of do? What SQL does it generate?
...gnment against non existing or invalid entries with validates_presence of :user_id, :role_id, it is useful. You can still generate a User @user with his association @user.role(params[:role_id]) so that saving the user would not result in a failing validation of the Assignment model.
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How to convert View Model into JSON object in ASP.NET MVC?
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What does preceding a string literal with “r” mean? [duplicate]
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The r means that the string is to be treated as a raw string, which means all escape codes will be ignored.
For an example:
'\n' will be treated as a newline character, while r'\n' will be treated as the characters \ followed by n.
When an 'r' or 'R' prefix is present,...
AngularJS-Twig conflict with double curly braces
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How can I list all tags in my Git repository by the date they were created?
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How to show particular image as thumbnail while implementing share on Facebook?
... type of page
The URL
The websites name
A description of the page
Facebook user_id's of administrators of the page ( on facebook )
Here is an example ( taken from the facebook documentation ) of some og:tags
<meta property="og:title" content="The Rock"/>
<meta property="og:type" content=...
Building vs. Compiling (Java)
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Some of the answers I see here are out-of-context and make more sense if this were a C/C++ question.
Short version:
"Compiling" is turning .java files into .class files
'Building" is a generic term that includes compiling and other tasks.
"Building" is a generic term describes...
Java: Difference between PrintStream and PrintWriter
...have many methods in common due to which I often mix these two classes up. Moreover, I think we can use them for exactly the same things. But there has to be a difference, otherwise, there would have been only one class.
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How do I encode/decode HTML entities in Ruby?
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