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how to use sed, awk, or gawk to print only what is matched?

I see lots of examples and man pages on how to do things like search-and-replace using sed, awk, or gawk. 11 Answers ...
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Can I see changes before I save my file in Vim?

I use Vim. I open a file. I edit it and I want to see what I've edited before I save it. 14 Answers ...
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Throwing exceptions from constructors

...ing a debate with a co-worker about throwing exceptions from constructors, and thought I would like some feedback. 10 Answe...
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Team city unmet requirement: MSBuildTools12.0_x86_Path exists

...d/details.aspx?id=40779) to install MSBuild12.0. – Brandon Jan 13 '14 at 20:51 37 ...
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How do I format a date with Dart?

I have an instance of DateTime and I would like to format that to a String. How do I do that? I want to turn the date into a string, something like "2013-04-20". ...
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通过FastCGI Cache实现服务降级 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... } location ~ \.php$ { set $cache_key $request_method://$host$request_uri; set $cache_bypass "1"; if ($arg_failover = "1") { set $cache_bypass "0"; } try_files $uri =404; include fastcgi.conf; fastcgi_pass ph...
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What's onCreate(Bundle savedInstanceState)

...avedInstanceState in onCreate(Bundle savedInstanceState) I am newbie in Android. I try to understand it from developer.android.com. But I am not able to understand. Can anyone simplify it? ...
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How do I display the current value of an Android Preference in the Preference summary?

...ntry()); } } This is easily extensible to other preference classes. And by using the getPreferenceCount and getPreference functionality in PreferenceScreen and PreferenceCategory, you could easily write a generic function to walk the preference tree setting the summaries of all preferences of...
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invalid context 0x0 under iOS 7.0 and system degradation

...oubt that's the issue. These invalid context 0x0 error messages are common and easy to reproduce in iOS 7. In fact, I can reproduce the error using storyboard with zero code. I drag a UITextField onto the canvas in IB, run the app, and double tap inside the text field. In many situations, it's har...
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adito-gateway -华为云免费SSL VPN解决方案 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...符 先别忙着重启服务器,我们现在可以替换到centos自带的openJDKl 不然客户端登录会出现 adito angent failed的错误提示、 [root@adito mnt]# ls adito-0.9.1-bin.zip jdk-7u17-linux-x64.tar.gz [root@adito mnt]# tar -zxvf jdk-7u17-linux-x64.tar.gz 解压出来...