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Shell one liner to prepend to a file
...'0a
your text here
.
w' | ed some_file
ed is the Standard Editor! http://www.gnu.org/fun/jokes/ed.msg.html
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How to check that an object is empty in PHP?
....net/manual/en/simplexmlelement.count.php
(that is not php's count http://www.php.net/count )
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Android代码优化小技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...数据稍微好些。
文章作者： lightSky
文章源自：http://www.lightskystreet.com/2015/01/17/android-code-optimize-tips/
Android 代码优化
How can I quickly delete a line in VIM starting at the cursor position?
...
Press ESC to first go into command mode. Then Press Shift+D.
https://www.fprintf.net/vimCheatSheet.html
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Removing multiple classes (jQuery)
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included i
...Steps to start Apache httpd.exe (I am using x64 VC11 example here)
http://www.apachelounge.com/download/VC11/
Be sure that you have installed Visual C++ Redistributable for Visual Studio 2012 : VC11 vcredist_x64/86.exe
http://www.microsoft.com/en-us/download/details.aspx?id=30679
You may need ...
What tools to automatically inline CSS style to create email HTML code? [closed]
When you take a look at http://www.campaignmonitor.com/css/ you learn that you need to embed inline styles in your HTML, in order for your email to be read in any mail client.
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...A3-F393-E0A9-E50E24DCCA9E。标准16位UUID技术文档请参考：https://www.bluetooth.com/specifications/assigned-numbers/。
点此自助购买 以上演示的aia源码。BLE专业文档更多关于BLE更深入的技术原理介绍，请参考BLE技术揭秘。
最后做个推广即日起，...
Local file access with JavaScript
.../write with Firefox back in 2003 web.archive.org/web/20031229011919/http://www.captain.at/… (bulit for XUL but available in the browser with XpCom) and Microsoft had node.js-style javscript shell scripting in the 1990s (and FileIO available in the browser with ActiveX)
– orig...
Understanding the Rails Authenticity Token
.... Here's the example from the Rails Guide on Security:
<a href="http://www.harmless.com/" onclick="
var f = document.createElement('form');
f.style.display = 'none';
this.parentNode.appendChild(f);
f.method = 'POST';
f.action = 'http://www.example.com/account/destroy';
f.submit();
...