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Big-O for Eight Year Olds? [duplicate]

I'm asking more about what this means to my code. I understand the concepts mathematically, I just have a hard time wrapping my head around what they mean conceptually. For example, if one were to perform an O(1) operation on a data structure, I understand that the number of operations it has to p...
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C++ performance challenge: integer to std::string conversion

Can anyone beat the performance of my integer to std::string code, linked below? 13 Answers ...
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Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?

I see java.util.function.BiFunction, so I can do this: 7 Answers 7 ...
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How to parse/format dates with LocalDateTime? (Java 8)

Java 8 added a new java.time API for working with dates and times ( JSR 310 ). 7 Answers ...
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How to delete/unset the properties of a javascript object? [duplicate]

I'm looking for a way to remove/unset the properties of a JS object so they'll no longer come up if I loop through the object doing for (var i in myObject) . How can this be done? ...
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记一次MongoDB性能问题 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...当我浏览MongoDB日志时,发现一些警告信息: WARNING: You are running on a NUMA machine. We suggest launching mongod like this to avoid performance problems: numactl –interleave=all mongod [other options] 当时我并不太清楚NUMA是什么东西,所以没有处理,只是...
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How to avoid using Select in Excel VBA

I've heard much about the understandable abhorrence of using .Select in Excel VBA, but am unsure of how to avoid using it. I am finding that my code would be more re-usable if I were able to use variables instead of Select functions. However, I am not sure how to refer to things (like the Activ...
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How to declare an ArrayList with values? [duplicate]

ArrayList or List declaration in Java has questioned and answered how to declare an empty ArrayList but how do I declare an ArrayList with values? ...
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创建自定义 TinyWebDB 服务 · App Inventor 2 中文网

... 创建自定义 TinyWebDB 服务 « 返回首页 TinyWebDB is an App Inventor component that allows you to store data persistently in a database on the web. Because the data is stored on the web instead...
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小米360同日竞技:智能手机血战再起 - 资讯 - 清泛网 - 专注C/C++及内核技术

...再起5月6日,小米推出一款被称为“定位产品”的小米Note顶配版真机。同日,奇虎360也宣布重回智能手机市场,欲通过成本价销售和众筹模式杀出重围。5月6日,小米科技发布小米Note顶配版真机,预计将于5月12日正式发售。此前...