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Zip lists in Python

... When you zip() together three lists containing 20 elements each, the result has twenty elements. Each element is a three-tuple. See for yourself: In [1]: a = b = c = range(20) In [2]: zip(a, b, c) Out[2]: [(0, 0, 0), (1, 1, 1), ... (17, 17, 17), (18, 18, 18...
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What is the fastest way to check if a class has a function defined?

I'm writing an AI state space search algorithm, and I have a generic class which can be used to quickly implement a search algorithm. A subclass would define the necessary operations, and the algorithm does the rest. ...
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How to toggle a value in Python

...0 >>> x ^= 1 >>> x 1 The technique generalizes to any pair of integers. The xor-by-one step is replaced with a xor-by-precomputed-constant: >>> A = 205 >>> B = -117 >>> t = A ^ B # precomputed toggle constant >>> x = A >>> x ^...
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用VC实现组态王数据的远程共享 - 文档下载 - 清泛网 - 专注C/C++及内核技术

用VC实现组态王数据的远程共享VC MFC DDE 网络通信DDE:动态数据交换机制交换机制DDE是一种动态数据交换机制(Dynamic Data Exchange,DDE)。使用DDE通讯需要两个Windows应用程序,其中一...DDE:动态数据交换机制 交换机制 DDE是一种动...
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App Inventor 2 上传文件到服务器的方案全总结 - App Inventor 2 中文网 - ...

...文本的方式,发送数据,服务端base64解码后,存储文件。下载过程是Web客户端通过网络url下载文件到手机。      类似地,也可以将图片Base64化后分片存储到网络微数据库。下载过程是将分片完整合并,并解码存储...
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Objective-C 2.0 Mac和iOS开发实践指南 PDF扫描版 - 文档下载 - 清泛网 - ...

Objective-C 2.0 Mac和iOS开发实践指南 PDF扫描版Objective-C Mac iOS《Objective-C 2.0 Mac和iOS开发实践指南》专门为那些想要学习Objecti Ve-C以便为Mac OS x或iOS编写程序的程序员量身打造。《Objectiv...截图: 《Objective-C 2.0 Mac和iOS开发实践指南...
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oracle10g 网址收藏 - ORACLE - 清泛IT论坛,有思想、有深度

...些软件,你需要一个OTN免费帐号,不过如果通过迅雷进行下载,就不用登陆OTN了: Oracle Database 10g Release 2 (10.2.0.1.0) Enterprise/Standard Edition for Microsoft Windows (32-bit) http://download.oracle.com/otn/nt/oracle10g/10201/10201_database_win32.zip http://down...
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下拉刷新拓展 - SwipeRefresh - App Inventor 2 拓展 - 清泛IT社区,为创新赋能!

...SwipeRefresh1 ▾.SizeLarge ▾ 设置SwipeRefresh1 ▾.SizeLarge ▾ 下载地址最后更新 2018.7.28 (v2)下载1(本站)下载2(Github release)源码 样例样例aia样例apk
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Tokumx 副本集(集群)全攻略 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...查看同步详情。(详细参见:https://www.tsingfun.com/it/bigdata_ai/335.html) 仲裁节点(投票):一个虚拟的从库(不可作为主库),不同步任何数据。 程序连接Mongo集群:不能单独连接从库,主库可以。 查看状态: ./mongo rs.statu...
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Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...api/contacts/id Delete a contact DELETE /api/contacts/id 准备工作 1. 下载并安装Mongo DB,步骤看这里。 2. Mongo DB C# driver下载可以在nuget搜索mongocsharpdriver。 3. 如果想本地察看数据库中内容,下载MongoVUE。 4. Knockoutjs下载可以在nuget搜索knockou...