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How do you remove duplicates from a list whilst preserving order?
...n:
seen_add(k)
yield element
In Python 2.7+ the accepted common idiom (which works but isn't optimized for speed, I would now use unique_everseen) for this uses collections.OrderedDict:
Runtime: O(N)
>>> from collections import OrderedDict
>>> ...
泡在Stack Overflow答题30天 - 创意 - 清泛网 - 专注C/C++及内核技术
...。
多年来，我一直受益于它，但未对它尽过绵薄之力。我在网站上找到过一打有帮助的答案，但我甚至不曾为它们点个赞。
是时候回报Stack Overflow了！
目标
某天我在浏览徽章列表时发现，可以通过连续30天访问网站而获得一...
/data/user/0/xxxx/files（内部存储）和 /storage/emulated/0/Android/data...
...权限即可读写。绝对路径在代码中不应硬编码（因 Android 版本/多用户可能变化）。
(2) 外部存储私有目录 (/storage/emulated/0/Android/data/xxxx)API 获取路径：File externalFilesDir = context.getExternalFilesDir(null); // /storage/emulated/0/Android/data/xxxx/fi...
谁在争抢UGC - 资讯 - 清泛网 - 专注C/C++及内核技术
...业务，而是一种用户使用互联网的新方式，即由原来的以下载为主变成下载和上传并重。YouTube、MySpace等网站都可以看做是UGC的成功案例，社区网络、视频分享、博客和播客(视频分享)等都是UGC的主要应用形式。
UGC正在成为互联...
我用AnyComponent块改造了App，30个按钮的代码从300行缩成了10行 - App应用...
...转为通用块（Make Generic）后，App Inventor 不允许转回特定版本。所以一定要先备份或者用"撤消"功能。建议新手先在测试项目里练手，别直接在生产项目上操作。
坑2：notAlreadyHandled 的含义
最初我把 notAlreadyHandled 理解成...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...et incorporated into the App Inventor release. But you can try some ofary AI2 server.
You can implement the RotationDetector.aix extension as described in part 2 below using the extension test send (2) may need to be rebuilt as the system evolves.
Contents
rver.
Keep in mind that the extensions...
Is there a simple way to remove multiple spaces in a string?
...
test_string = 'The fox jumped over\n\t the log.' # trivial
Python 2.7.3, 32-bit, Windows
test | minum | maximum | average | median
---------------------+------------+------------+------------+-----------
while_replace_test | 0.001066 | 0.001260 | 0.001...