Anti Wi-Fi Theft Wallpaper In The Work

We have heard about anti wi-fi paint which could block potential wifi theft who love to steal someone’s wireless internet connection to use. They are rude, but it’s our fault anyway to let the wifi signal accessible anywhere as far a the router can reach. Even the latest WPA2 protection is unable to block the smartest wireless theft in the block who’ve got the tools.

The only option to avoid and disband WiFi theft is by securing the signal in a closed the room, where the wall has been painted with anti wifi theft. However, the good news is that the researchers at the Institut Polytechnique de Grenoble (INP) is currently working on a new stuff that will be able to block the wifi signal from leaking out.

They’ve been working on some type of new wallpaper that could block a certain electromagnetic wave frequencies, and prevent them from being sniffed by outsider. What’s cool about this anti-WiFi theft wallpaper is that your cell phones frequencies will not be block or affected at all. You can still make your phone calls regardless how secure the room is.

The wallpaper will also gives us more options to decor the room. For example, I believe once the wallpaper has been successfully researched, it will be available in various kind of ‘flavor’ or design that we can use them to decor the wall and ceiling. Although it’s purely a prediction, I believe they are going to head into that direction.

[via SpringWise ][Ahlstrom ]

Anti Wi-Fi Theft Wallpaper In The Work
Visit HardwareSphere for more Hot Hardware and Cool Gadgets !
Copyright © 2008-2012 HardwareSphere.com .
(Digital Fingerprint: 898923c3c23813b1a2cd8206318d2f89)

在XCode4开发工具中，自己写的代码，在它们杂乱无章的时候，如何快速格式化，或者说美化它们呢？

对于初学者而言，这也是一个问题，没意见的吧。至少曾经对于我来说，是个问题。

(miki西游 @mikixiyou 文档，原文链接: http://mikixiyou.iteye.com/blog/1558555 )

传统的美化或者说格式化方法：

在菜单中，editor 主菜单，再structure，再re-intent

还有一种快速的格式化方法也被推荐，方法是这样：

全选文件中的所有代码，再command+x ，再command+v。

这就是全选，剪切，再粘贴。XCode会自动格式化好代码。这个方法很好用。

还有其他方法，如何intent命令去格式化所有的文件，或者其他工具如vi等等。

接口只能定义好空的方法，不能有具体的实现，但是抽象类可以有。一般的做法是这样。把接口定义好了。抽象类去实现这个接口，具体的实现类继承这个方法。这样就可以有选择性的去实现了。比如说：一个接口有10几个方法。这时候可以写一个抽象类去implement这个接口。可以去具体实现，也可以是空实现。再写一个具体的类，继承自这个抽象类，这时候就可以有针对性地选择重写的方法了。而不用去实现10几个接口方法。还有就是抽象类可以有构造器。比如有一些通用的变量或者方法，可以写在抽象类里面去。这样也可以通过这个抽象类直接使用啦。