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What are the rules for the “…” token in the context of variadic templates?
...pecific actions. So the following is not possible:
typedef Ts MyList; // error!
Ts var; // error!
auto copy = vs; // error!
Expansion loci
Function arguments
template <typename... Ts>
void fun(Ts... vs)
Initializer lists
any a[] = { vs... };
Base specifiers
template...
What is the reason not to use select *?
...
If you specify columns in a SQL statement, the SQL execution engine will error if that column is removed from the table and the query is executed.
You can more easily scan code where that column is being used.
You should always write queries to bring back the least amount of information.
As others...
Is there any simple way to find out unused strings in Android project?
...many more. From its official site:
Here are some examples of the types of errors that it looks for:
- Missing translations (and unused translations)
- Layout performance problems (all the issues the old layoutopt tool used to find, and more)
- Unused resources
- Inconsistent array sizes (when arra...
PDO MySQL: Use PDO::ATTR_EMULATE_PREPARES or not?
...it occurs on the MySQL server.
Without EMULATE_PREPARES you may get syntax errors at prepare-time rather than at execute-time; with EMULATE_PREPARES you will only get syntax errors at execution time because PDO doesn't have a query to give to MySQL until execution time. Note that this affects the co...
Cannot push to Heroku because key fingerprint
...me issues with this one. Whenever I " git push heroku master ", I get this error:
10 Answers
...
Rails respond_with: how does it work?
...r json: resource
elsif request.post? or request.put?
if resource.errors.any?
render json: {:status => 'failed', :errors => resource.errors}
else
render json: {:status => 'created', :object => resource}
end
end
end
end
While there may be some ...
When do I use fabs and when is it sufficient to use std::abs?
... That's weird. Your call should've been ambiguous (and thus an error) right?
– Nick
Jan 12 '13 at 15:57
Sh...
Is it good practice to make the constructor throw an exception? [duplicate]
...y number of other possible declared and undeclared exceptions. This makes error recovery difficult, and if the caller chooses to propagate the Exception, the problem just spreads.
1 - Some people may disagree, but IMO there is no substantive difference between this case and the case of throwing ...
How to assign a heredoc value to a variable in Bash?
...use set -e and always recommend against its use. It's better to use proper error handling instead. trap is your friend. Other friends: else and || among others.
– Paused until further notice.
Jun 29 '11 at 3:37
...
What is the purpose of using -pedantic in GCC/G++ compiler?
...n causes gcc to issue warnings in such cases. Using the stricter
-pedantic-errors option converts such diagnostic warnings into errors that will cause compilation
to fail at such points. Only those non-ISO constructs that are required to be flagged by a conforming
compiler will generate warnings or ...