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Select first 4 rows of a data.frame in R

... answered Apr 19 '10 at 13:45 Eduardo LeoniEduardo Leoni 8,74466 gold badges3838 silver badges4646 bronze badges ...
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Github: Import upstream branch into fork

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MongoDB: Is it possible to make a case-insensitive query?

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Getting started with F# [closed]

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App Inventor 2 App上架国内应用市场完整指南 · App Inventor 2 中文网

...过(腾讯管家绿标) 1.2 软件著作权(软著) 1.3 隐私政策合规 二、隐私合规深度要求 2.1 敏感权限说明 2.2 消息推送 2.3 注册/登录处隐私勾选 2.4 隐私政策扩展组件 三、推荐上架平台...
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What is a monad?

...t an example of method chaining which does not use the monad pattern: [1,2,3].map(x => x + 1) The result is [2,3,4]. The code does not conform to the monad pattern, since the function we are supplying as argument returns a number, not an Array. The same logic in monadic form would be: [1,2,3].fl...
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nginx showing blank PHP pages

... answered Mar 15 '13 at 4:34 Julian H. LamJulian H. Lam 20.4k1212 gold badges4040 silver badges6969 bronze badges ...
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Linux, Why can't I write even though I have group permissions?

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Spring @PropertySource using YAML

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Copy folder structure (without files) from one location to another

... Vitaly Isaev 4,21444 gold badges3636 silver badges5454 bronze badges answered Nov 1 '10 at 23:37 Greg HewgillGreg Hewgill ...