大约有 44,000 项符合查询结果（耗时：0.0355秒） [XML]
Why compile Python code?
...an run them directly from the .py file and it works fine, so is there a performance advantage or something?
10 Answers
...
How to deal with a slow SecureRandom generator?
...cryptographically strong random numbers in Java, you use SecureRandom . Unfortunately, SecureRandom can be very slow. If it uses /dev/random on Linux, it can block waiting for sufficient entropy to build up. How do you avoid the performance penalty?
...
How to read the value of a private field from a different class in Java?
...ass in a 3rd-party JAR and I need to access one of its private fields. For example,
why should I need to choose private field is it necessary?
...
30岁之后，程序员该向什么方向发展？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...得与这个行业不相关。所以不要以年龄做为借口。
我是81年的，但是我没有停止过学习，因为我知道还有那么多年轻人比你优秀，你有什么资格不再学习？而且我是做前端的，很多人知道，前端越来越难，新技术新工具新框架...
How to know what the 'errno' means?
...
You can use strerror() to get a human-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#include <errno.h>
#include <str...
CSS center text (horizontally and vertically) inside a div block
...hat more complicated. But there are solutions on http://pmob.co.uk/. Look for "vertical align".
Since they tend to be hacks or adding complicated divs... I usually use a table with a single cell to do it... to make it as simple as possible.
Update for 2020:
Unless you need make it work on earl...
What is the difference between --save and --save-dev?
...
--save-dev is used to save the package for development purpose.
Example: unit tests, minification..
--save is used to save the
package required for the application to run.
share
...
Swift: #warning equivalent
... may very well release a //WARNING: landmark, or provide the functionality for another named landmark.
To envoke this functionality with Swift in Xcode today however, you could do the following as outlined by Ben Dodson & Jeffrey Sambells:
Add a new Run Script to your target's build phases tab...
When should I use Arrow functions in ECMAScript 6?
...pt compiled using Traceur Babel. I'm now using the following rule of thumb for functions in ES6 and beyond:
Use function in the global scope and for Object.prototype properties.
Use class for object constructors.
Use => everywhere else.
Why use arrow functions almost everywhere?
Scope safet...
Round to at most 2 decimal places (only if necessary)
...
While this will work for most cases, it will not work for 1.005 which will end up coming out to be 1 instead of 1.01
– James
Jun 13 '13 at 14:33
...