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程序员之网络安全系列（二）：如何安全保存用户密码及哈希算法 - 更多技术 ...
...多就999次不就打开了？那么问题来了，你的密码箱还安全吗？
彩虹表
除了穷举法外，由于之前的密码泄露，那么攻击者们，手上都有大量的彩虹表，比如”I love you”,生日等等，这个表保存了这些原值以及MD5后的值，那么使用...
What is the meaning of single and double underscore before an object name?
...ple, to make a thread-safe queue with a different queueing discipline than FIFO, one imports Queue, subclasses Queue.Queue, and overrides such methods as _get and _put; "client code" never calls those ("hook") methods, but rather the ("organizing") public methods such as put and get (this is known a...
Once upon a time, when > was faster than < … Wait, what?
...educes traffic on memory bus. When a frame is complete (swap is called, or FIFOs are flushed because they are full, framebuffer bindings change, etc) the framebuffer must be resolved; this means every bin is processed in turn.
The driver must assume that the previous contents must be preserved. Th...
程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
...是，就算浏览器地址栏的锁不能变绿，我们还得订票不是吗？
我觉得12306可能需要一个操作系统内置的认证机构来发一个证书，不然普通的用户根本不知道怎么安装证书，如果不使用https，那么安全性如何得到保证呢？
最后
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Is a Python list guaranteed to have its elements stay in the order they are inserted in?
...behavior for adding and removing elements (stacks being LIFO, queues being FIFO). Lists are practical representations of, well, lists of things. A string can be thought of as a list of characters, as the order is important ("abc" != "bca") and duplicates in the content of the string are certainly pe...
How to get the ThreadPoolExecutor to increase threads to max before queueing?
...s the task into the queue to be processed by the first available thread in FIFO order.
Although in my example code above, the queue is unbounded, you could also define it as a bounded queue. For example, if you add a capacity of 1000 to the LinkedBlockingQueue then it will:
scale the threads u...
为什么你有10年经验，但成不了专家？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...想一下：刚刚是不是有效训练了沟通技巧？还有哪些可以继续提升的？我还用了什么技巧？
对于大部分人来说，日常工作的所有事情，不论是沟通客户、改个公关稿件还是写一段文案，我们总是缺乏动力去超越自身极限，把...
How do I set a variable to the output of a command in Bash?
...er starting the task (via coproc).
We just need some file descriptors and fifos for doing this properly:
mkfifo /tmp/myFifoForBc
exec 5> >(bc -l >/tmp/myFifoForBc)
exec 6</tmp/myFifoForBc
rm /tmp/myFifoForBc
(Of course, FD 5 and 6 have to be unused!)... From there, you could use this p...
多媒体组件 · App Inventor 2 中文网
...默认选项），则无论当前屏幕是否显示，音频播放器都会继续播放。
源文件
设置音频源文件。
音量
将音量属性设置为 0 到 100 之间的数字。小于 0 的值将被视为 0，大于 100 的值将被视为 100。
事件
已播放完成时()
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Representing and solving a maze given an image
...ly difference is the underlying structure. Stack (FILO) for DFS and queue (FIFO) for BFS.
– Mikhail
Oct 22 '12 at 9:06
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