240
收录了14053篇文章 ·14922个问题 · 0人关注
0

What is the best method of handling currency/money

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: I\'mworkingonaverybasicshoppingcartsystem. Ihaveatableitemsthathasacolumnpriceoftypeinteger. I\'mhavingtroubledisp......

0

Learning Ruby on Rails

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: Asitstandsnow,I\'maJavaandC#developer.ThemoreandmoreIlookatRubyonRails,themoreIreallywanttolearnit. Whathavey......

0

Code block passed to each works with brackets but

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: Irecentlystartedlearningruby,andIunderstoodthatyoucoudusecodeblockswithbothofthesesyntaxes.ButIjustfoundacasewhichI......

0

What is the difference or value of these block cod

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: Whichstyleispreferred? Isthereagoodreasonforonevs.theother? Thanksinadvance! 1)cmds.eachdo|cmd| end 2)cmds.each{|cm......

0

Difference between class variables and class insta

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: Cananyonetellmeaboutthedifferencebetweenclassvariablesandclassinstancevariables? 回答1: Aclassvariable(@@)issharedamon......

0

Ruby class instance variable vs. class variable

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: Iread\"WhendoRubyinstancevariablesgetset?\"butI\'moftwomindswhentouseclassinstancevariables. Classvariablesareshared......

0

bundle install fails with SSL certificate verifica

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: WhenIrunbundleinstallformyRails3projectonCentos5.5itfailswithanerror: Gem::RemoteFetcher::FetchError:SSL_connectreturned=......

0

How do I update Ruby Gems from behind a Proxy (ISA

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: ThefirewallI\'mbehindisrunningMicrosoftISAserverinNTLM-onlymode.HashanyonehavesuccessgettingtheirRubygemstoinstall/updat......

0

Installing gem or updating RubyGems fails with per

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: Tryingtoinstallagem(geminstallmygem)orupdateRubyGems(gemupdate--system)failswiththiserror: ERROR:Whileexecutinggem.........

0

Test if a string is basically an integer in quotes

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: Ineedafunction,is_an_integer,where \"12\".is_an_integer?returnstrue \"blah\".is_an_integer?returnsfalse howcanidothisinrub...

0

How do I parse JSON with Ruby on Rails? [duplicate

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: Thisquestionalreadyhasananswerhere: ParsingaJSONstringinRuby 7......

0

rvm installation not working: “RVM is not a functi

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: IjustinstalledRVM,butcan\'tmakeitwork.Ihavesuchlineattheendofmy.profilefile: [[-s\"$HOME/.rvm/scripts/rvm\"]]&&.\"$......

0

How to sum array of numbers 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: Ihaveanarrayofintegers. Forexample: array=[123,321,12389] Isthereanynicewaytogetthesumofthem? Iknow,that sum=0 a......

0

How to generate a random string 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: I\'mcurrentlygeneratingan8-characterpseudo-randomuppercasestringfor\"A\"..\"Z\": value=\"\";8.times{value<<(...

0

Double vs single quotes

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: I\'mreallynewtoRubyandI\'mtryingtounderstandifthere\'saspecifictimewhenIshoulduse\"\"vs\'\'. I\'vebeenusingsinglequ......

0

Using do block vs braces {}

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: Newtoruby,putonyournewbiegloves. Isthereanydifference(obscureorpractical)betweenthefollowingtwosnippets? my_array=[:uno......

0

How do I encode/decode HTML entities 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: IamtryingtodecodesomeHTMLentities,suchas\'&amp;lt;\'becoming\'<\'. Ihaveanoldgem(html_helpers)butitseemstohavebeenab......

0

How do I pick randomly from an array?

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: Iwanttoknowifthereisamuchcleanerwayofdoingthis.Basically,Iwanttopickarandomelementfromanarrayofvariablelength.No......

0

How to select unique elements

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: IwouldliketoextendtheArrayclasswithauniq_elementsmethodwhichreturnsthoseelementswithmultiplicityofone.Ialsowouldliket......

0

How to avoid NoMethodError for missing elements in

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: I\'mlookingforagoodwaytoavoidcheckingfornilateachlevelindeeplynestedhashes.Forexample: name=params[:company][:owner][:n......