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How can I define colors as variables in CSS?
...
CSS supports this natively with CSS Variables.
Example CSS file
:root {
--main-color:#06c;
}
#foo {
color: var(--main-color);
}
For a working example, please see this JSFiddle (the example shows one of the CSS selectors in the fiddle has the color hard coded to blue, the other C...
两大桌面系统之战：Yosemite vs Windows 10 - 操作系统(内核) - 清泛网 - ...
... 的主要对比，OS X Yosemite 向我们证明了一个操作系统应该如何演变进化，至于 Windows 10 最好的评价或许只能说，和上一代相比没有那么糟糕了。不知道各位读者有怎样的看法？Yosemite,Win10,OS X
实现一个简单的服务端推方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...味着简陋，轮询数据库是不可以接受的，下面我们来看看如何解决这个问题。在这里我们放弃了传统的LAMP技术，转而使用Nginx与Lua来实现。
Modified Long Polling
此方案的主要思路是这样的：使用Nginx作为服务端，通过Lua协程来...
Where does Android emulator store SQLite database?
...o your regular hard drive.
Edit: Removed suggestion that this works for unrooted devices too - it only works for emulators, and devices where you are operating adb as root.
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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...from t_mv_test@dblink_name;
这样，不管数据库A上的此表的主键如何变化，我一概不管。但是，有时必须要使用with primary key，例如跨库跨平台时。
物化视图对应的表上没有主键，如果需要索引可以另行添加。
最后小结一下，这个...
How to mount a host directory in a Docker container
...nt boot2docker file on linux container
docker run -v /boot2dockerfolder:/root/containerfolder -i -t imagename
Then when you ls inside the containerfolder you will see the content of your hostfolder.
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How to check if command line tools is installed
... user has a password. A blank password won't work when trying to enable a root user.
System Preferences > Users and Groups > (select user) > Change password
Then to enable root, run dsenableroot in a terminal:
$ dsenableroot
username = mac_admin_user
user password:
root password:
verif...
80后夫妻创业，如今身价68亿，怎么做到？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...对诊断治疗的帮助可想而知。“其实，玩的就是大数据，如何将大数据应用到智慧城市就是我们接下来的一大重要内容。”王麒诚说。
当然，王麒诚想做的远不止这些，他希望把汉鼎做成更大的一个集团帝国。
80后 创业 身价
When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
...roblems where a RDBMS is not a viable solution, for all other things I use MySQL (or SQLite for testing).
If you need a NoSQL db you usually know about it, possible reasons are:
client wants 99.999% availability on
a high traffic site.
your data makes
no sense in SQL, you find yourself
doing mult...
How to split a comma-separated value to columns
... @S = 'ab,cd,ef,gh,ij',
@Split = ','
SELECT @X = CONVERT(xml,' <root> <myvalue>' +
REPLACE(@S,@Split,'</myvalue> <myvalue>') + '</myvalue> </root> ')
SELECT T.c.value('.','varchar(20)'), --retrieve ALL values at once
T.c.value('(/root/my...