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Use cases for NoSQL [closed]
...an using a relational database,
where we have to make joins with different tables to get all the data we need
Besides, this use case is optimal because avoids all the principal limits of a NoSQL database:
Lack of transactions: The application doesn't perform writes but only reads, so we don't ne...
Insert text with single quotes in PostgreSQL
I have a table test(id,name) .
7 Answers
7
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make_unique and perfect forwarding
...le it might look pleasing to the eye, it doesn't bring anything new to the table. Correction: this isn't in fact true: Having a function call to wrap the new expression provides exception safety, for example in the case where you call a function void f(std::unique_ptr<A> &&, std::uniqu...
Practical usage of setjmp and longjmp in C
...r to free the memory. Also, this does not have so many blasted exceptions tables that all C++ compilers still generate 20 years after the fact.
– artless noise
Mar 10 '13 at 2:51
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How to implement has_many :through relationships with Mongoid and mongodb?
...ongs_to_many :physicians
end
In other words you would eliminate the join table and it would have a similar effect to has_many :through in terms of access to the 'other side'. But in your case thats probably not appropriate because your join table is an Appointment class which carries some extra in...
Ways to eliminate switch in code [closed]
...attern, whether implemented with a switch statement, if else chain, lookup table, oop polymorphism, pattern matching or something else.
Do you want to eliminate the use of the "switch statement" or the "switch pattern"? The first one can be eliminated, the second one, only if another pattern/algori...
Iterator invalidation rules
...invalidated, but iterators to elements remaining in a2 will remain valid. (Table 91 — Unordered associative container requirements)
Container Adaptors
stack: inherited from underlying container
queue: inherited from underlying container
priority_queue: inherited from underlying container
Eras...
How do I expire a PHP session after 30 minutes?
...>
<html>
<form name="form1" method="post">
<table>
<tr>
<td>Username</td>
<td><input type="text" name="text"></td>
</tr>
<tr>
<td&g...
Android accelerometer accuracy (Inertial navigation)
...Xr, Yr, and Zr. Without the rotation data, you don't have enough data to establish a vector unless you assume the device never changes it's attitude, which would be pretty limiting. No one reads the TOS anyway.
Oh, and you know that INS drifts with the rotation of the earth, right? So there's that ...
What is the difference between UTF-8 and Unicode?
...0xxxxxx (3+6+6+6)=21 10FFFF hex (1,114,111)
According to the table above, if we want to store this character using the 'UTF-8' format, we need to prefix our character with some 'headers'. Our chinese character is 16 bits long (count the binary value yourself), so we will use the forma...