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What does it mean when git says a file “needs update”?
...d to /var/www/html/). After running this, [git status] and [git pull] both now show it's up-to-date.
– Keith DC
Jun 12 '15 at 5:46
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Count(*) vs Count(1) - SQL Server
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now that you ask, I'm not sure. I thought for COUNT(*) to run, it needs a table, so the sub-query should act like one. Otherwise, I don't see a way for COUNT(*) to return a meaningful value
– asgs
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Handle spring security authentication exceptions with @ExceptionHandler
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I know the question is a little bit old, but did you register your AuthenticationEntryPoint to SecurityConfig?
– leventunver
Dec 21 '16 at 18:52
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Child with max-height: 100% overflows parent
...d to be as tall as possible. The only other constraint acting on the child now is the max-width of its parent, and since the image itself is taller than it is wide, it overflows the container's height downwards, in order to maintain its aspect ratio while still being as large as possible overall.
W...
Possible to make labels appear when hovering over a point in matplotlib?
...the scatter plot would be unreadable if I labeled each point. Does anyone know of a way to create labels that only appear when the cursor hovers in the vicinity of that point?
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Query EC2 tags from within instance
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The ec2metadata tool is deprecated. Now you query the 'magic' URL at 169.254.169.254/latest/meta-data - hit it with cURL and it gives you magic endpoints you can use to get various bits of data. In this case curl http://169.254.169.254/latest/meta-data/instance...
how to generate migration to make references polymorphic
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As far as I know, there's no built-in generator for polymorphic associations. Generate a blank migration and then modify it by hand according to your needs.
Update:
You'll need to specify which table you're changing. According to this S...
How do I lowercase a string in Python?
...icode_literal.lower()
u'\u043a\u0438\u043b\u043e\u043c\u0435\u0442\u0440'
Now if we only have it in the form of a str, we need to convert it to unicode. Python's Unicode type is a universal encoding format that has many advantages relative to most other encodings. We can either use the unicode cons...
Show SOME invisible/whitespace characters in Eclipse
...visible characters like tabs but not show other invisibles like spaces. I know that I can bulk turn all of these on in Eclipse, but I wonder if there is a way to show only some invisibles in Eclipse.
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Best way to define error codes/strings in Java?
...g or whatever*/ id();
}
public interface IMessage {
ICode code();
}
Now you can define any number of enums which provide me