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Linux 网卡速率（百兆/千兆）的查看及调整 - 操作系统(内核) - 清泛网 - 专...
...et/{ethXXX}/speed #查看某网卡的速率(MB)（百兆or千兆等）
ip -d link #查看网卡工作状态：UP -启用；DOWN -未启用
ethtool -s {ethXXX} [speed 10|100|1000] #设置网卡速率为10M/100M/1000M
注：上述命令仅限于物理机查看，虚拟机无效，虚拟机...
Linux修改主机名（不过需谨慎！） - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...说修改主机名需要谨慎？
Linux主机名的重要性几乎就和 IP地址等同了，因此部分程序的工作会依赖主机名，有些机器重启就能自动切换新的主机名，但是还有一些比如编译期间指定了旧的主机名，改名后有可能会无法工作，笔...
【持续更新】App Inventor 2 中文拓展一览 - App Inventor 2 中文网 - 清泛...
...项目文件中提取.aix拓展包
中文网拓展
【剪贴板】 Clipboard 拓展：实现剪贴板的复制粘贴功能
【短信平台接入】 AliSms 拓展：阿里云短信平台接入，短信验证码
【设备信息】 PhoneInfo 拓展：获取手机等设备软硬件、版本等...
Is an empty href valid?
... of the existing answers references the relevant specifications.
An empty string can’t be a URI. However, the href attribute doesn’t only take URIs as value, but also URI references. An empty string may be a URI reference.
HTML 4.01
HTML 4.01 uses RFC 2396, where it says in section 4.2. Same-...
How to control the line spacing in UILabel
...Style = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 40
let attrString = NSMutableAttributedString(string: "Swift Answer")
attrString.addAttribute(.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
var tableViewCell = NSTableCellView()
tableViewCell.textField...
Add custom messages in assert?
...==b is false, the and-expression should also be false, and, therefore, the string should not be evaluated.
– ragnarius
Nov 7 '14 at 17:31
1
...
Local Storage vs Cookies
...a
Expiration dates
Cons
Each domain stores all its cookies in a single string, which can make
parsing data difficult
Data is unencrypted, which becomes an issue because... ... though
small in size, cookies are sent with every HTTP request Limited size
(4KB)
SQL injection can be performed from a ...
Linux下安装项目管理工具Redmine - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...My account里可以修改成其它语言。
启动WEB服务
# ruby script/server webrick -e production
或# ruby /usr/local/redmine/script/server webrick -e production
停止web服务方法：在当前启动窗口按ctrl+C
访问http://ip:3000/
初始用户名/密码：admin/admin
这...
Uses for Optional
...de to work, but it's rather clumsy. Suppose you have a method that takes a string followed by an optional second string. Accepting an Optional as the second arg would result in code like this:
foo("bar", Optional.of("baz"));
foo("bar", Optional.empty());
Even accepting null is nicer:
foo("bar", ...
Using XPATH to search text containing
... <td>&nbsp;</td>
</tr>
To locate the node with the string &nbsp; you can use either of the following xpath based solutions:
Using text():
"//td[text()='\u00A0']"
Using contains():
"//td[contains(., '\u00A0')]"
However, ideally you may like to avoid the NO-BRE...