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How to install PyQt4 on Windows using pip?
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In the filenames cp27 means C-python version 2.7, cp35 means python 3.5, etc.
Since Qt is a more complicated system with a compiled C++ codebase underlying the python interface it provides you, it can be more complex to build than just a pure python code package, which means it can be hard to ins...
Favourite performance tuning tricks [closed]
...bles
Build with triggers on the underlying tables
Build daily / hourly / etc.
Build ad-hoc
Build incrementally or teardown / rebuild
See what the query plan is with SET SHOWPLAN ON
See what’s actually happenning with SET STATS IO ON
Force an index using the pragma: (index: myindex)
Force th...
How to detect when cancel is clicked on file input?
...nt is not triggered.
Concept
My solution to this is *shudder* to measure CPU timing to determine if the page is currently in the foreground or the background. On mobile devices, processing time is given to the app currently in the foreground. When a camera is visible it will steal CPU time and dep...
Changing the interval of SetInterval while it's running
...n. setTimeout is subject to being delayed (by 100% cpu use, other scripts, etc) where as setInterval IS NOT affected by those delays--making it far superior for 'realtime' stuff
– RozzA
Dec 26 '13 at 20:59
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list every font a user's browser can display
... of not working on some devices ( iDevices, browsers without Flash plugin, etc), or a partial list with better support via JavaScript only.
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
...content type, conetent length, user-agent, server id, date, last-modified, etc. Once a WebSockets connection is established, only the data required by the application needs to be sent back and forth.
Typically, HTTP servers are configured to log the start and completion of every HTTP request taking ...
Is It Possible to Sandbox JavaScript Running In the Browser?
...ited to iframe granularity.
In general, no degree of regular expressions, etc. can safely sanitise arbitrary user provided JavaScript as it degenerates to the halting problem :-/
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App Inventor 2 文字转图片教程 - 文图生成方案 · App Inventor 2 中文网
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实战案例：社交分享卡片
功能
常见问题
Q1: WebView截图中文显示乱码？
Q2: html2canvas截图为空白？
Q3: 生成的图片分辨率不够？
总结
« 返回首页
概述
“文图”——...
Eclipse RCP开发桌面程序 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...进依赖项，否则会出错。最开始的时候，就是这么一点小问题，让我浪费了几天时间。
再点击添加必须的插件，自动添加其它的依赖项。
再下一步，设置项目的构建路径，如下图：
下一步，导出我们的...
How are zlib, gzip and zip related? What do they have in common and how are they different?
...le compression levels that allow trading off compression effectiveness for CPU time. zlib and PKZIP are not the only implementations of deflate compression and decompression. Both the 7-Zip archiving utility and Google's zopfli library have the ability to use much more CPU time than zlib in order to...