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MySQL - why not index every field?
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Indexes take up space in memory (RAM); Too many or too large of indexes and the DB is going to...
How to test multiple variables against a value?
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I wouldn't be so quick to go for the set version. Tuple's are very cheap to create and iterate over. On my machine at least, tuples are ...
int a[] = {1,2,}; Weird comma allowed. Any particular reason?
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vcsjonesvcsjones
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Error installing mysql2: Failed to build gem native extension
...t be 127.0.0.1, and if the password is number, it must be put in quote ex '123456' otherwise we can type normally ex admin123
– duykhoa
Oct 30 '12 at 7:46
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Why can I add named properties to an array as if it were an object?
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CaseyCasey
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Why did my Git repo enter a detached HEAD state?
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I reproduced this just now by accident:
lists the remote branches
git branch -r
origi...
Can I call a base class's virtual function if I'm overriding it?
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Yes,
class Bar : public Foo
{
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void printStuff()
{
Foo::printStuff();...
Rails: create on has_one association
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First of all, here is how to do what you want:
@user = current_user
@shop = Shop.create(param...
Where and why do I have to put the “template” and “typename” keywords?
...}; /* (C) --> */ f_tmpl<X> ();
struct Y { static int const foo = 123; }; /* (D) --> */ f_tmpl<Y> ();
The two different scenarios:
If we instantiate the function-template with type X, as in (C), we will have a declaration of a pointer-to int named x, but;
if we instantiate the ...
What is /dev/null 2>&1?
...iptors - standard input, output, and error.
– Testing123
Sep 15 '17 at 17:22
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@Nobody check my a...