魚樂無窮
Why whitelists (and blacklists) are long-term poison for online systems
Every so often, well intentioned people propose that we can dealwith the problems of various sorts of abuse in online forums and systemsby having people build whitelists or blacklists (often with some sort ofautomated web of trust system). While this sounds great, it's a bad idea.
One of the old lessons from Usenet is that resorting to individualwhitelists or blacklists to make a forum usable is ultimatelydestructive to the forum itself, because it more or less totally killsoff the supply of good newcomers to the
一個都不能少
Mythbusters uses Nikon Lens on High-Speed Camera
One of my favorite features of any Mythbusters shows is the high-speed sequences, where they film an explosion, a reaction, etc. on a high-speed camera, then slow it down to half or a quarter of real life speed ( example ).
Watching season four on Netflix recently, I saw a rare closeup of the high-speed, and to my surprise, found mounted a 50mm f/1.4D Nikon lens (the same one I use on my D90 7
[轉] 希特拉談民主
男人如衣服
Red Letter Day
But there's a catch. The right thing to say – as it is when it comes to so many aspects of red letter days – is what's appropriate for everyone.
If there's anything more embarrassing than a question "So, when are you going to tie the knot?" in a wedding party, it
袁彌明畀面試本地牌 最緊要短
袁彌明畀面試本地牌 最緊要短
2009年12月06日
Overcoming the drawbacks of preforking accept() servers
I was going to say that while preforking accept() -based servers don't in practice have a thundering herdproblem, they do have two other issues, namely there's no way to tellwhen you need to grow the number of processes you're using and no way totell if a process has frozen. (The more complicated preforking scheme has neither problem.)
However, some thought showed me that it's possible to get around theseproblems while retaining the advantages of the pure accept(
What version of Python is included in various current OSes
For my own curiosity, here is a rundown of what version of Python is invarious current OS distributions, along with whether or not a version ofPython 3 is available as an optional package.
(The version of Python is my best guess at what you get if you runplain ' python ' at a command line.)
| OS | Python version | Optional Python 3? |
| Solaris 10 update 8 | 2.4.4 (2.6 available in Blastwave) | No |
| Red Hat Enterprise 5 (and CentOS 5) | 2 |