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The authorization mechanism you have provided is n

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IgetanerrorAWS::S3::Errors::InvalidRequestTheauthorizationmechanismyouhaveprovidedisnotsupported.PleaseuseAWS4-HMAC-SHA256.w......

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What does the (unary) * operator do in this Ruby c

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: GiventheRubycode line=\"first_name=mickey;last_name=mouse;country=usa\" record=Hash[*line.split(/=|;/)] Iunderstandeverything......

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Getting output of system() calls in Ruby

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IfIcallacommandusingKernel#systeminRuby,howdoIgetitsoutput? system(\"ls\") 回答1: I\'dliketoexpand&clarifychaos\'s......

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What is Ruby's double-colon `::`?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whatisthisdouble-colon::?E.g.Foo::Bar. Ifoundadefinition: The::isaunaryoperatorthatallows:constants,instancemethods......

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class << self idiom in Ruby

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whatdoesclass<<selfdoinRuby? 回答1: First,theclass<<foosyntaxopensupfoo\'ssingletonclass(eigenclass).Thisallowsyout......

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How can I remove RVM (Ruby Version Manager) from m

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: HowcanIremoveRVM(RubyVersionManager)frommysystem? 回答1: There\'sasimplecommandbuilt-inthatwillpullit: rvmimplode T......

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What is the difference between require_relative an

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whatisthedifferencebetweenrequire_relativeandrequireinRuby? 回答1: Justlookatthedocs: require_relativecomplementsthe......

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How to pass command line arguments to a rake task

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Ihavearaketaskthatneedstoinsertavalueintomultipledatabases. I\'dliketopassthisvalueintotheraketaskfromthecommand......

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Difference between “or” and || in Ruby?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: What\'sthedifferencebetweentheorand||operatorsinRuby?Orisitjustpreference? 回答1: It\'samatterofoperatorprecedence. ......

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How do I use the conditional operator (? :) in Rub

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Howistheconditionaloperator(?:)usedinRuby? Forexample,isthiscorrect? <%question=question.size>20?question.question.slic......

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Difference between “and” and && in Ruby?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Whatisthedifferencebetweenthe&&andandoperatorsinRuby? 回答1: andisthesameas&&butwithlowerprecedence.Theybothusesh......

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Array slicing in Ruby: explanation for illogical b

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: IwasgoingthroughtheexercisesinRubyKoansandIwasstruckbythefollowingRubyquirkthatIfoundreallyunexplainable: array=[:pe......

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Does ruby have real multithreading?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试):问题: Iknowaboutthe\"cooperative\"threadingofrubyusinggreenthreads.HowcanIcreatereal\"OS-level\"threadsinmyapplicationinorder......