Connecting Rails 3.1 with Multiple Databases
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: AtShowNearbywehavebeendoingaverybigmigrationtoRoR3.1fromPHPandwearefacingseveralproblemsthatmaybesomeofyouhavesol......
rbenv not changing ruby version
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: Iinstalledrbenvaccordingtothegithubdirections.IamrunningOSXbutIhavetriedthisonaUbuntu12.04VMandgotthesameresults.T......
PG::ConnectionBad - could not connect to server: 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: EverytimeIrunmyrails4.0server,Igetthisoutput. StartedGET"/"for127.0.0.1at2013-11-0623:56:36-0500 PG::ConnectionBad-cou......
Rails params explained?
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: CouldanyoneexplainparamsinRailscontroller:wheretheycomefrom,andwhattheyarereferencing? defcreate @vote=Vote.new(para......
When to use lambda, when to use Proc.new?
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: InRuby1.8,therearesubtledifferencesbetweenproc/lambdaontheonehand,andProc.newontheother. Whatarethosedifferences? Can......
How to make --no-ri --no-rdoc the default for gem
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: Idon'tusetheRIorRDocoutputfromthegemsIinstallinmymachineorintheserversIhandle(Iuseothermeansofdocumentation). Eve......
Where and how is the _ (underscore) variable speci
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: Mostareawareof_’sspecialmeaninginIRBasaholderforlastreturnvalue,butthatisnotwhatI'maskingabouthere. Instead,I’ma......
Ruby 2.0.0p0 IRB warning: “DL is deprecated, pleas
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: IjustuninstalledmyolderversionsofRuby,removedallofmygems (includingRails),andinstalledRuby2.0.Inotherwords,atotallycle......
do..end vs curly braces for blocks 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: IhaveacoworkerwhoisactivelytryingtoconvincemethatIshouldnotusedo..endandinsteadusecurlybracesfordefiningmultilineblo......
ActiveRecord: size vs count
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: InRails,youcanfindthenumberofrecordsusingbothModel.sizeandModel.count.Ifyou'redealingwithmorecomplexqueriesisthereany......
What is the easiest way to duplicate an activereco
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: Iwanttomakeacopyofanactiverecordrecord,changingasinglefieldintheprocess(inadditiontotheid).Whatisthesimplestwayto......
Blocks and yields 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: IamtryingtounderstandblocksandyieldandhowtheyworkinRuby. Howisyieldused?ManyoftheRailsapplicationsI'velookedatusey......
ruby floating point errors
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: Cansomebodyexplainwhymultiplyingby100heregivesalessaccurateresultbutmultiplyingby10twicegivesamoreaccurateresult? ±%......
Is 'eval' supposed to be nasty?
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: Ihavebeenusingevalfeatureofrubymanyatimes.ButIhaveheardpeoplesayingevalsarenasty.Whenasked,whyandhow,Icouldneverg......
How to understand symbols 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: Despitereading"UnderstandingRubySymbols",I'mstillconfusedbytherepresentationofthedatainmemorywhenitcomestousingsymbols.......
Sorting an array in descending order 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: Ihaveanarrayofhasheslikefollowing [ {:foo=>'foo',:bar=>2}, {:foo=>'foo',:bar=>3}, {:foo=>'foo',:bar=>5}, ]......
How to get a random number 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: HowdoIgeneratearandomnumberbetween0andn? 回答1: Userand(range) FromRubyRandomNumbers: Ifyouneededarandomintegert......
Ruby block and unparenthesized arguments
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: Iextractedsimpleexample: require\'pp\' x=1..3 ppx.mapdo|i|{:value=>i,:double=>(i*2)}end ppx.map{|i|{:value=>i,:double......
What do you call the &: operator in Ruby? [duplica
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: PossibleDuplicates: Ruby/RubyonRailsampersandcolonshortcut Whatdoesmap(&:name)meaninRuby? IwasreadingStackoverflow......
Ruby: How to post a file via HTTP as multipart/for
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: IwanttodoanHTTPPOSTthatlookslikeanHMTLformpostedfromabrowser.Specifically,postsometextfieldsandafilefield. Posting......
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