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How to get the top 10 values in postgresql?
...
For this you can use limit
select *
from scores
order by score desc
limit 10
If performance is important (when is it not ;-) look for an index on score.
Starting with version 8.4, you can also use the standard (SQL:2008) fetch first
select *
from scores
order by scor...
Meaning of @classmethod and @staticmethod for beginner? [duplicate]
...instances and classes:
A dotted lookup on an instance is performed in this order - we look for:
a data descriptor in the class namespace (like a property)
data in the instance __dict__
a non-data descriptor in the class namespace (methods).
Note, a dotted lookup on an instance is invoked like this...
Exact time measurement for performance testing [duplicate]
...= Environment.TickCount; was used as input to the algorithm under test, in order to make it non-deterministic and prevent it from being evaluated at compile-time. That seed is not being used here.
– piedar
Nov 7 '19 at 16:55
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...h a secure mechanism and both processes have to explicitly attach to it in order to use it.
The privileged mode is usually referred to as 'kernel' mode because the kernel is executed by the CPU running in this mode. In order to switch to kernel mode you have to issue a specific instruction (often ...
How can I automate the “generate scripts” task in SQL Server Management Studio 2008?
...id (users are converted to roles, constraints are not created in the right order), but it is not a solution for me because it doesn't script objects to different files like the Tasks->Generate Scripts option in SSMS does. I'm currently using a modified version of Scriptio (uses the MS SMO API) to...
What is the correct answer for cout
...ce result b, which outputs 01.
See P0145R3 Refining Expression Evaluation Order for Idiomatic C++ for more details.
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How can I convert a std::string to int?
...ind updating this answer with from_chars from C++17? It is supposed to be orders of magnitude faster than stoi.
– NathanOliver
Jul 29 '19 at 12:44
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TypeScript function overloading
...ve code (safer than JS). TS chooses the first fitting overload in top-down order, so overloads are sorted from most specific to most broad.
Method overloading in TS: a more complex example
Overloaded class method types can be used in a similar way to function overloading:
class LayerFactory {
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System.currentTimeMillis vs System.nanoTime
...fferent threads. Even if the events of the threads happen in a predictable order, the difference in nanoseconds can be positive or negative.
System.currentTimeMillis() is safe for use between threads.
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When do you use Git rebase instead of Git merge?
...oes conserve all your nice commits, or even give you the opportunity to re-order them through an interactive rebase).
In that case (where you rebase while being in the B branch), you are right: no further merge is needed:
A Git tree at default when we have not merged nor rebased
we get by rebas...