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Postgresql: Conditionally unique constraint
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2 Answers
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grep a file, but show several surrounding lines?
...he match and -A num for the number of lines after the match.
grep -B 3 -A 2 foo README.txt
If you want the same number of lines before and after you can use -C num.
grep -C 3 foo README.txt
This will show 3 lines before and 3 lines after.
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Random date in C#
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private Random gen = new Random();
DateTime RandomDay()
{
DateTime start = new DateTime(19...
What does ':' (colon) do in JavaScript?
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var o = {
r: 'some value',
t: 'some other value'
};
is functionally equivalent to
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Getting name of the class from an instance
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CiNNCiNN
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Let JSON object accept bytes or let urlopen output strings
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Automapper - how to map to constructor parameters instead of property setters
...tTo(x.Name));
var from = new ObjectFrom { Name = "Jon", Age = 25 };
ObjectTo to = Mapper.Map<ObjectFrom, ObjectTo>(from);
Assert.That(to.Name, Is.EqualTo(from.Name));
Assert.That(to.Age, Is.EqualTo(from.Age));
}
}
public class...
What is the difference between `git fetch origin` and `git remote update origin`?
...te didn't actually use the same codepath until v1.6.6.1 (released December 23 2009). Even before that, though, they did essentially the same thing, just using different code (possibly behaving slightly differently in corner cases, but I can't think of any off the top of my head).
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What is the difference between POST and GET? [duplicate]
...d POST is used to insert/update remote data.
HTTP/1.1 specification (RFC 2616) section 9 Method Definitions contains more information on GET and POST as well as the other HTTP methods, if you are interested.
In addition to explaining the intended uses of each method, the spec also provides at lea...