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Order by multiple columns with Doctrine
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answered Jul 20 '12 at 8:11
Diego AgullóDiego Agulló
8,03933 gold badges2323 silver badges3838 bronze badges
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Merge cells using EPPlus?
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answered May 30 '11 at 5:49
Carles CompanyCarles Company
6,40855 gold badges4747 silver badges7171 bronze badges
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Differences in boolean operators: & vs && and | vs ||
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Those are the bitwise AND and bitwise OR operators.
int a = 6; // 110
int b = 4; // 100
// Bitwise AND
int c = a & b;
// 110
// & 100
// -----
// 100
// Bitwise OR
int d = a | b;
// 110
// | 100
// -----
// 110
System.out.println(c); // 4
System.out.println(d); // 6
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What does a double * (splat) operator do
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Ruby 2.0 introduced keyword arguments, and ** acts like *, but for keyword arguments. It returns a Hash with key / value pairs.
For this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
&g...
Magic number in boost::hash_combine
...umber is supposed to be 32 random bits, where each is equally likely to be 0 or 1, and with no simple correlation between the bits. A common way to find a string of such bits is to use the binary expansion of an irrational number; in this case, that number is the reciprocal of the golden ratio:
phi...
git: Apply changes introduced by commit in one repo to another repo
...<commit>)
is here to translate <commit> (for example HEAD, or v0.2, or master~2, which are values in the second repository you copy from) into SHA-1 identifier of commit. If you know SHA-1 of a change you want to pick, it is not necessary.
NOTE however that Git can skip copying objects...
How do I strip non alphanumeric characters from a string and keep spaces?
...ces to the negated character group:
@search_query = @search_query.gsub(/[^0-9a-z ]/i, '')
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How do I uninstall a package installed using npm link?
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answered Sep 30 '13 at 12:44
nwinklernwinkler
43.5k1818 gold badges132132 silver badges149149 bronze badges
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Convert list to tuple in Python
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30
You might have done something like this:
>>> tuple = 45, 34 # You used `tuple` as a v...
Why do all browsers' user agents start with “Mozilla/”?
...y.
In summary:
Mozilla browser gets released, with User-Agent Mozilla/1.0 (Win3.1). It is publicly renamed to Netscape, but in its User-Agent it keeps its original name .
Internet Explorer is released. It spoofs Netscape by starting its User-Agent with Mozilla/ because web servers were routinely ...