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What exactly is Arel in Rails 3.0?
I understand that it is a replacement for ActiveRecord and that it uses objects instead of queries.
4 Answers
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Spring Expression Language (SpEL) with @Value: dollar vs. hash ($ vs. #)
... ${...} . Furthermore, when I started with SpEL I was told to use ${...} and it works fine.
4 Answers
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Cache busting via params
... a system for doing so. My thought was to apply a param to the end of css and js files with the current version number:
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Does MySQL ignore null values on unique constraints?
...sult:
x
NULL
NULL
1
This is not true for all databases. SQL Server 2005 and older, for example, only allows a single NULL value in a column that has a unique constraint.
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PHP foreach change original array values
I am very new in multi dimensional arrays, and this is bugging me big time.
5 Answers
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Run a JAR file from the command line and specify classpath
I've compiled a JAR file and specified the Main-Class in the manifest (I used the Eclipse Export function). My dependencies are all in a directory labeled lib . I can't seem to get a straight answer on how to execute my JAR file while specifying it should use the lib/* as the classpath.
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CSS: Animation vs. Transition
So, I understand how to perform both CSS3 transitions and animations . What is not clear, and I've googled, is when to use which.
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Why does 'continue' behave like 'break' in a Foreach-Object?
...let (it even has the alias foreach that helps to make this conversion easy and make mistakes easy, too). All continues should be replaced with return.
P.S.: Unfortunately, it is not that easy to simulate break in ForEach-Object.
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nodejs how to read keystrokes from stdin
...ming keystrokes in a running nodejs script?
If I use process.openStdin() and listen to its 'data' event then the input is buffered until the next newline, like so:
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What are the differences between .gitignore and .gitkeep?
What are the differences between .gitignore and .gitkeep ? Are they the same thing with a different name, or do they both serve a different function?
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