大约有 42,000 项符合查询结果（耗时：0.0585秒） [XML]
What exactly are “spin-locks”?
...ritical sections etc), operating system puts your thread in the WAIT state and preempts it by scheduling other threads on the same core. This has a performance penalty if the wait time is really short, because your thread now has to wait for a preemption to receive CPU time again.
Besides, kernel ob...
What is “callback hell” and how and why does RX solve it?
...xplains what is a "callback hell" for someone who does not know JavaScript and node.js ?
8 Answers
...
Regular expression to match numbers with or without commas and decimals in text
I'm trying to locate and replace all numbers in a body of text. I've found a few example regex's, which almost solve the problem, but none are perfect yet. The problem I have is that the numbers in my text may or may not have decimals and commas. For example:
...
What is Haskell used for in the real world? [closed]
...world applications. What are the most popular projects / usages of Haskell and why it excels at solving these problems?
10 ...
What is a “cache-friendly” code?
What is the difference between " cache unfriendly code " and the " cache friendly " code?
9 Answers
...
setuptools vs. distutils: why is distutils still a thing?
Python has a confusing history of tools that can be used to package and describe projects: these include distutils in the Standard Library, distribute , distutils2 , and setuptools (and maybe more). It appears that distribute and distutils2 were discontinued in favor of setuptools , which...
Pointers in C: when to use the ampersand and the asterisk?
I'm just starting out with pointers, and I'm slightly confused. I know & means the address of a variable and that * can be used in front of a pointer variable to get the value of the object that is pointed to by the pointer. But things work differently when you're working with arrays, string...
How do I edit an incorrect commit message in git ( that I've pushed )?
I want to modify a commit message deeper in history and I've pushed many new commits.
7 Answers
...
Configure WAMP server to send email
...auth_password=your_password
The above will work against a Gmail account.
And then configure php.ini:
sendmail_path = "C:\wamp\sendmail\sendmail.exe -t"
Now, restart Apache, and that is basically all you need to do.
sha...
How can I prevent SQL injection in PHP?
...
Use prepared statements and parameterized queries. These are SQL statements that are sent to and parsed by the database server separately from any parameters. This way it is impossible for an attacker to inject malicious SQL.
You basically have two...