大约有 40,000 项符合查询结果（耗时：0.0492秒） [XML]
Benchmarking (python vs. c++ using BLAS) and (numpy)
...a program that makes extensive use of BLAS and LAPACK linear algebra functionalities. Since performance is an issue I did some benchmarking and would like know, if the approach I took is legitimate.
...
Is there anything like inotify on Windows?
With the Linux OS, there is the ionotify subsystem which notifies an application of changes to the filesystem.
8 Answers
...
SQLite UPSERT / UPDATE OR INSERT
...
This is a late answer. Starting from SQLIte 3.24.0, released on June 4, 2018, there is finally a support for UPSERT clause following PostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age;
Note: F...
Renew Provisioning Profile
Just got a notice that the provisioning profile for one of my apps is about to expire. Is there some way I can renew the existing one or must I recreate a new one?
...
Django Server Error: port is already in use
...
A more simple solution just type sudo fuser -k 8000/tcp.
This should kill all the processes associated with port 8000.
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
...
How can you program if you're blind?
Sight is one of the senses most programmers take for granted. Most programmers would spend hours looking at a computer monitor (especially during times when they are in the zone ), but I know there are blind programmers (such as T.V. Raman who currently works for Google).
...
Virtual functions and performance - C++
In my class design, I use abstract classes and virtual functions extensively. I had a feeling that virtual functions affects the performance. Is this true? But I think this performance difference is not noticeable and looks like I am doing premature optimization. Right?
...
How to delete all rows from all tables in a SQL Server database?
...
Note that TRUNCATE won't work if you have any referential integrity set.
In that case, this will work:
EXEC sp_MSForEachTable 'DISABLE TRIGGER ALL ON ?'
GO
EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL'
GO
EXEC sp_MSForEachTable...
Task continuation on UI thread
Is there a 'standard' way to specify that a task continuation should run on the thread from which the initial task was created?
...
How can I sort arrays and data in PHP?
...
Basic one dimensional arrays
$array = array(3, 5, 2, 8);
Applicable sort functions:
sort
rsort
asort
arsort
natsort
natcasesort
ksort
krsort
The difference between those is merely whether key-value associations are kept (the "a"...