大约有 47,000 项符合查询结果（耗时：0.0560秒） [XML]
What is the meaning of “non temporal” memory accesses in x86
...to be seen by other processors in a timely fashion.
When data is produced and not (immediately) consumed again, the fact that memory store operations read a full cache line first and then modify the cached data is detrimental to performance. This operation pushes data out of the caches which might ...
Is Fortran easier to optimize than C for heavy calculations?
...ode that has aliasing is not valid Fortran, but it is up to the programmer and not the compiler to detect these errors. Thus Fortran compilers ignore possible aliasing of memory pointers and allow them to generate more efficient code. Take a look at this little example in C:
void transform (float *...
Does :before not work on img elements?
...
The before and after pseudo-selectors don't insert HTML elements — they insert text before or after the existing content of the targeted element. Because image elements don't contain text or have descendants, neither img:before or im...
Render a string in HTML and preserve spaces and linebreaks
...As part of that I have a description (retrieved from a db) that has spaces and new lines. When it is rendered the new lines and spaces are ignored by the html. I would like to encode those spaces and new lines so that they aren't ignored.
...
What is the difference between null and undefined in JavaScript?
I want to know what the difference is between null and undefined in JavaScript.
33 Answers
...
Automatically import modules when entering the python or ipython interpreter
... documentation:
If this is the name of a readable file, the Python commands in that
file are executed before the first prompt is displayed in interactive
mode. The file is executed in the same namespace where interactive
commands are executed so that objects defined or imported in it can b...
What are the risks of running 'sudo pip'?
... from the Internet as root. If someone puts up a malicious project on PyPI and you install it, you give an attacker root access to your machine. Prior to some recent fixes to pip and PyPI, an attacker could also run a man in the middle attack to inject their code when you download a trustworthy proj...
Is it acceptable and safe to run pip install under sudo?
...
I don't understand why this is the best answer. The question is NOT about virtual environments. It's about validity of using sudo pip install. Let's say I need to install some package that I'll use in many projects or at system level. Such ...
Test if a command outputs an empty string
How can I test if a command outputs an empty string?
11 Answers
11
...
Understanding the Event Loop
I am thinking about it and this is what I came up with:
3 Answers
3
...