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......
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......
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......
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......
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......
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......
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......
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......
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. ......
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......
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......
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......
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......