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What does it mean to hydrate an object?
...atabase, from the network, or from a file system).
From Erick Robertson's comments on this answer:
deserialization == instantiation + hydration
If you don't need to worry about blistering performance, and you aren't debugging performance optimizations that are in the internals of a data acces...
How to increment a pointer address and pointer's value?
...t me if I'm wrong.
EDIT:
So I was wrong, the precedence is a little more complicated than what I wrote, view it here:
http://en.cppreference.com/w/cpp/language/operator_precedence
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What is the advantage of using forwarding references in range-based for loops?
...ol> v(10);
for (auto& e : v)
e = true;
}
This doesn't compile because rvalue vector<bool>::reference returned from the iterator won't bind to a non-const lvalue reference. But this will work:
#include <vector>
int main()
{
std::vector<bool> v(10);
fo...
Why does X[Y] join of data.tables not allow a full outer join, or a left join?
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Right query to get the current number of connections in a PostgreSQL DB
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Note that when the postgres command line tool, PSQL is used for executing this query, the total number of connections is the result of this query - 1 since the psql connection made is also included as a connection
– neonidian
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Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
... no possibility of hidden or subtle unexpected behavior. However, the most common and idiomatic way is “the mutable way”.
As a final aside, this behavior of Hash default values is noted in Ruby Koans.
† This isn’t strictly true, methods like instance_variable_set bypass this, but they mu...
Grep not as a regular expression
...le $someVar . However, Grep thinks that I am trying to run a regex and is complaining:
6 Answers
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demystify Flask app.secret_key
...one would be able to break your encryption; it's like the password to your computer. The secret plus the data-to-sign are used to create a signature string, a hard-to-recreate value using a cryptographic hashing algorithm; only if you have the exact same secret and the original data can you recreate...
How can I select item with class within a DIV?
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