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Rails 3 check if attribute changed
Need to check if a block of attributes has changed before update in Rails 3.
5 Answers
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How to write Unicode characters to the console?
I was wondering if it was possible, in a console application, to write characters like ℃ using .NET. When I try to write this character, the console outputs a question mark.
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@UniqueConstraint and @Column(unique = true) in hibernate annotation
What is difference between @UniqueConstraint and @Column(unique = true) ?
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How to use JavaScript variables in jQuery selectors?
How do I use JavaScript variables as a parameter in a jQuery selector?
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Jquery selector input[type=text]')
I wrote a code that basically selects all input type=text element like this:
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What is the “__v” field in Mongoose
I'm using Mongoose version 3 with MongoDB version 2.2. I've noticed a __v field has started appearing in my MongoDB documents. Is it something to do with versioning? How is it used?
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Is it possible to use getters/setters in interface definition?
At the moment, TypeScript does not allow use get/set methods(accessors) in interfaces.
For example:
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How to branch with TortoiseHG
I downloaded TortoiseHg 1.0 for evaluation. For the life of me I can't figure out how to make a branch. It seems to understand branches (e.g. in its repository browser) but I just can't seem to find a way to make a branch. This seems like such a fundamental capability since out of the often toute...
CFLAGS vs CPPFLAGS
I understand that CFLAGS (or CXXFLAGS for C++) are for the compiler, whereas CPPFLAGS is used by the preprocessor.
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What makes JNI calls slow?
I know that 'crossing boundaries' when making a JNI call in Java is slow.
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