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Logical operators for boolean indexing in Pandas

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When should I use Arrow functions in ECMAScript 6?

...is. (Stats via http://trends.builtwith.com/javascript/jQuery and https://www.npmjs.com.) You are likely to require dynamic this bindings already. A lexical this is sometimes expected, but sometimes not; just as a dynamic this is sometimes expected, but sometimes not. Thankfully, there is a bette...
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What's the difference between eval, exec, and compile?

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Fastest way to iterate over all the chars in a String

...is ever in a production environment (not advised), read this first: http://www.javaspecialists.eu/archive/Issue237.html Starting from Java 9, the solution as described won't work anymore, because now Java will store strings as byte[] by default. SECOND UPDATE: As of 2016-10-25, on my AMDx64 8core an...
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What's so bad about Template Haskell?

...efully! Going after TH-like capabilities for method defaults led to http://www.haskell.org/haskellwiki/GHC.Generics . While this is cool stuff, my only experience debugging code using these generics was nigh-impossible, due to the size of the type induced for and ADT as complicated as an AST. https...
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The case against checked exceptions

...king about) Anders Hejlsberg, the MS genius behind .NET and C#. http://www.artima.com/intv/handcuffs.html Fan though I am of Hejlsberg and his work, this argument has always struck me as bogus. It basically boils down to: "Checked exceptions are bad because programmers just abuse them by ...
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What are the real-world strengths and weaknesses of the many frameworks based on backbone.js? [close

...lopment for the project. There is a description on the project at : http://www.hautelooktech.com/2012/05/24/vertebrae-front-end-framework-built-with-backbone-js-and-requirejs-using-amd/ Our Problem: Selected libraries (jQuery, Underscore.js, Backbone.js, RequireJS, Mustache) provide module loadin...
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Polymorphism in C++

...is more inclusive, as per C++ creator Bjarne Stroustrup's glossary (http://www.stroustrup.com/glossary.html): polymorphism - providing a single interface to entities of different types. Virtual functions provide dynamic (run-time) polymorphism through an interface provided by a base class. Overl...
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OceanBase使用libeasy原理源码分析:服务器端 - 数据库(内核) - 清泛网 - ...

...asy_pool_t :内存池,和nginx的内存池实现几乎一样,见http://www.alidata.org/archives/1390 它不是一个全局的内存池,libeasy中可以有很多个,比如对于每个新的连接产生一个easy_pool_t 2.3 easy_buf_t : 用于管理连接的输入输出缓冲区 #define E...
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What is the difference between quiet NaN and signaling NaN?

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