# Ruby **URL:** https://www.ruby-forum.com/c/ruby/7.md?page=555 [Latest](https://www.ruby-forum.com/latest.md) · [Categories](https://www.ruby-forum.com/categories.md) · [Tags](https://www.ruby-forum.com/tags.md) **Page:** 556 --- ## [Luhn](https://www.ruby-forum.com/t/luhn/192796)
**Author:** [@usmanhhussain](https://www.ruby-forum.com/u/usmanhhussain)\ **Replies:** 1\ **Last updated:** [August 5, 2010, 6:20pm UTC](https://www.ruby-forum.com/t/luhn/192796 "2010-08-05T18:20:06Z")
Hi Guys, Has anyone used the Luhn Algorithm before? I need to write some ruby code to generate random card details but as my ruby isnt to great im a bit stuck. i have the code written by a previous developer in Pytho… --- ## [Ruby gem update issue in macos 10.5.7](https://www.ruby-forum.com/t/ruby-gem-update-issue-in-macos-10-5-7/179279)
**Author:** [@junmin](https://www.ruby-forum.com/u/junmin)\ **Replies:** 7\ **Last updated:** [August 5, 2010, 5:20pm UTC](https://www.ruby-forum.com/t/ruby-gem-update-issue-in-macos-10-5-7/179279 "2010-08-05T17:20:56Z")
i was trying to update the rubygem preinstalled in macos 10.5.7 by:sudo gem update --system or gem update --system. but i am getting this: sudo gem update --system Updating RubyGems… ERROR: While executing gem … … --- ## [String concatenation in ruby](https://www.ruby-forum.com/t/string-concatenation-in-ruby/192787)
**Author:** [@yani\_engico](https://www.ruby-forum.com/u/yani_engico)\ **Replies:** 2\ **Last updated:** [August 5, 2010, 4:58pm UTC](https://www.ruby-forum.com/t/string-concatenation-in-ruby/192787 "2010-08-05T16:58:41Z")
Hi, This seems to be a basic question but i would like to know why. String concatenation in rails can be done in the following three ways: a+b+c a\<\ **Author:** [@pshah](https://www.ruby-forum.com/u/pshah)\ **Replies:** 3\ **Last updated:** [August 5, 2010, 3:38pm UTC](https://www.ruby-forum.com/t/unknown-character-print-on-irb-or-command-prompt/192766 "2010-08-05T15:38:33Z") hi, I read html file using nokogiri. and its work fine. But after read when i print it, it shows me unknown charater like “ ” in place of hello so it looks like “hello ”. it create problem bcoz of   and… --- ## [Programma allineamento](https://www.ruby-forum.com/t/programma-allineamento/192784)
**Author:** [@wonderwall](https://www.ruby-forum.com/u/wonderwall)\ **Replies:** 0\ **Last updated:** [August 5, 2010, 1:53pm UTC](https://www.ruby-forum.com/t/programma-allineamento/192784 "2010-08-05T13:53:03Z")
Salve! Qualcuno di voi ne sa qualcosa di allineamento ottimo locale tra due sequenze? Devo fare un progetto per l’università ma non riesco più ad andare avanti! HELP! --- ## [Used Car Sri Lanka](https://www.ruby-forum.com/t/used-car-sri-lanka/192782)
**Author:** [@remo](https://www.ruby-forum.com/u/remo)\ **Replies:** 0\ **Last updated:** [August 5, 2010, 1:50pm UTC](https://www.ruby-forum.com/t/used-car-sri-lanka/192782 "2010-08-05T13:50:44Z")
Used Car Sri Lanka Used Car Sri Lanka, Not Only For Sri Lanka, All Over The World, Just In A Single Click You Will Get A Car At A Very Price. Sell Your Used Car Or Buy Our Car In Seconds From Sri Lanka i.e Used Car … --- ## [\*array $B$G0\[\>o=\*N;(B](https://www.ruby-forum.com/t/array-b-g0-o-n-b/192771)
**Author:** [@SSSBS.EDSSB\_SSBMxDL](https://www.ruby-forum.com/u/SSSBS.EDSSB_SSBMxDL)\ **Replies:** 3\ **Last updated:** [August 5, 2010, 1:37pm UTC](https://www.ruby-forum.com/t/array-b-g0-o-n-b/192771 "2010-08-05T13:37:51Z")
e$B\>.EDMxDL$H?=$7$^$9!#e(B ruby 1.9.1 e$B$G%"%!\<%H$7$^$9!#e(B $ ruby -e ‘x=\[1\];\[2,\*x\];x’ e$B$?$V$s!"%P%0$8$c$J$$$+$H!#e(B T.Oda --- ## [Output and return value](https://www.ruby-forum.com/t/output-and-return-value/192776)
**Author:** [@amiref](https://www.ruby-forum.com/u/amiref)\ **Replies:** 1\ **Last updated:** [August 5, 2010, 11:29am UTC](https://www.ruby-forum.com/t/output-and-return-value/192776 "2010-08-05T11:29:04Z")
Hi What is difference between “output” and “return value”? for example when we executed “puts 1+1” ruby outputs 2 and return nil. --- ## [\[Bug #3659\] Marshal.load(Marshal.dump(10.0)) =\> 1.0](https://www.ruby-forum.com/t/bug-3659-marshal-load-marshal-dump-10-0-1-0/192774)
**Author:** [@Tomoyuki\_C](https://www.ruby-forum.com/u/Tomoyuki_C)\ **Replies:** 1\ **Last updated:** [August 5, 2010, 11:27am UTC](https://www.ruby-forum.com/t/bug-3659-marshal-load-marshal-dump-10-0-1-0/192774 "2010-08-05T11:27:53Z")
Bug #3659: Marshal.load(Marshal.dump(10.0)) =\> 1.0 http://redmine.ruby-lang.org/issues/show/3659 e$B5/I\<\ **Author:** [@paradise](https://www.ruby-forum.com/u/paradise)\ **Replies:** 6\ **Last updated:** [August 5, 2010, 11:09am UTC](https://www.ruby-forum.com/t/net-smtp/192714 "2010-08-05T11:09:01Z") Okay I am officially stumped!!! output from my current code looks like this (from my client inbox, yahoo and gmail. \[ No Subject \] From removed\_email\_address@domain.invalid To: removed\_email\_address@domain.invalid… --- ## [Ruby scrips getting executed in a loop](https://www.ruby-forum.com/t/ruby-scrips-getting-executed-in-a-loop/192767)
**Author:** [@parulg2386](https://www.ruby-forum.com/u/parulg2386)\ **Replies:** 3\ **Last updated:** [August 5, 2010, 10:19am UTC](https://www.ruby-forum.com/t/ruby-scrips-getting-executed-in-a-loop/192767 "2010-08-05T10:19:23Z")
While calling multiple ruby scripts into a single file, my scripts are getting executed in a loop. Can someone please suggest me how to carry out the execution of all the scripts just once? For eg., I have abc.rb, xyz… --- ## [Warning: method redefined; discarding old \<=\>](https://www.ruby-forum.com/t/warning-method-redefined-discarding-old/192760)
**Author:** [@ralphshnelvar](https://www.ruby-forum.com/u/ralphshnelvar)\ **Replies:** 1\ **Last updated:** [August 5, 2010, 10:12am UTC](https://www.ruby-forum.com/t/warning-method-redefined-discarding-old/192760 "2010-08-05T10:12:48Z")
I have monkey patched the spaceship operator in an FXRuby Class. I do want to do this … so how do I turn off this warning? --- ## [Ruby exception overhead](https://www.ruby-forum.com/t/ruby-exception-overhead/192764)
**Author:** [@dukeh](https://www.ruby-forum.com/u/dukeh)\ **Replies:** 1\ **Last updated:** [August 5, 2010, 10:10am UTC](https://www.ruby-forum.com/t/ruby-exception-overhead/192764 "2010-08-05T10:10:05Z")
I’ve been seeing various bits and pieces mentioning the overhead Ruby’s (and other languages’) exception handling adds to a program (eg. comments on http://rpheath.com/posts/237-raising-custom-exceptions-in-rails, and … --- ## ["can't convert Subclass\_..." when isolating an interface](https://www.ruby-forum.com/t/cant-convert-subclass-when-isolating-an-interface/192707)
**Author:** [@nieve](https://www.ruby-forum.com/u/nieve)\ **Replies:** 8\ **Last updated:** [August 5, 2010, 8:53am UTC](https://www.ruby-forum.com/t/cant-convert-subclass-when-isolating-an-interface/192707 "2010-08-05T08:53:16Z")
Hello all, I’ve been trying to use caricature to stub my services in my controllers tests, now when I try to test this code: public TestController(ITestService service) { \_service = service; } when my interface is… --- ## [Rails3 Engines (mountable apps)](https://www.ruby-forum.com/t/rails3-engines-mountable-apps/192718)
**Author:** [@hjblok](https://www.ruby-forum.com/u/hjblok)\ **Replies:** 9\ **Last updated:** [August 5, 2010, 8:24am UTC](https://www.ruby-forum.com/t/rails3-engines-mountable-apps/192718 "2010-08-05T08:24:01Z")
Hello, I’ve a question about Rails 3 Engines. I’m looking everywhere for good documentation on this subject, but didn’t find it. I’m trying to create a mountable app (embedding a Rails application in another Rails ap… --- ## [HTTPClient can't login to Google Voice](https://www.ruby-forum.com/t/httpclient-cant-login-to-google-voice/192660)
**Author:** [@mtubbs](https://www.ruby-forum.com/u/mtubbs)\ **Replies:** 9\ **Last updated:** [August 5, 2010, 6:47am UTC](https://www.ruby-forum.com/t/httpclient-cant-login-to-google-voice/192660 "2010-08-05T06:47:31Z")
I’m trying to login to Google Voice using the following code: require ‘httpclient’ Google\_Login = ‘googlename’ Google\_Password = ‘password’ PRE\_LOGIN\_URL = “https://www.google.com/accounts/ServiceLogin” LOGIN\_U… --- ## [Activerecord-jdbc-adapter DB2 testing](https://www.ruby-forum.com/t/activerecord-jdbc-adapter-db2-testing/191942)
**Author:** [@kreucher](https://www.ruby-forum.com/u/kreucher)\ **Replies:** 5\ **Last updated:** [August 5, 2010, 6:10am UTC](https://www.ruby-forum.com/t/activerecord-jdbc-adapter-db2-testing/191942 "2010-08-05T06:10:00Z")
Hey Folks, Ok, so I’ve finally gotten around to creating a github fork\[1\] of activerecord-jdbc-adapter so I can start working on properly adding in the DB2 enhancements I’ve been using locally. I even managed to comp… --- ## [Fwd: "can't convert Subclass\_..." when isolating an interface](https://www.ruby-forum.com/t/fwd-cant-convert-subclass-when-isolating-an-interface/192753)
**Author:** [@barby](https://www.ruby-forum.com/u/barby)\ **Replies:** 2\ **Last updated:** [August 5, 2010, 5:13am UTC](https://www.ruby-forum.com/t/fwd-cant-convert-subclass-when-isolating-an-interface/192753 "2010-08-05T05:13:48Z")
try doing ITestService.isolate or isolation\_for ITestService Met vriendelijke groeten - Best regards - Salutations Ivan Porto C. Author of IronRuby in Action (http://manning.com/carrero) Microsoft IronRuby/C# MVP --- ## [How to use xslt on Windows Ruby](https://www.ruby-forum.com/t/how-to-use-xslt-on-windows-ruby/192610)
**Author:** [@Author](https://www.ruby-forum.com/u/Author)\ **Replies:** 5\ **Last updated:** [August 5, 2010, 3:51am UTC](https://www.ruby-forum.com/t/how-to-use-xslt-on-windows-ruby/192610 "2010-08-05T03:51:52Z")
Hi, I am new to Ruby, i just want to automate my daily work by using some ruby script. here is a question, how to use xslt in Ruby under Windows, since Windows is my working system. Here are my job to be done: I need… --- ## [Return value problem](https://www.ruby-forum.com/t/return-value-problem/192750)
**Author:** [@amiref](https://www.ruby-forum.com/u/amiref)\ **Replies:** 3\ **Last updated:** [August 5, 2010, 1:48am UTC](https://www.ruby-forum.com/t/return-value-problem/192750 "2010-08-05T01:48:57Z")
Hi What is happen for return value in these 2 codes ? (Please analysis for me result of these 2 codes) def test1(name) puts “Hello”+name end def test2(name) puts “Hello”+name 1+1 end return\_value1 = test1(“ami… --- ## [Fwd: "can't convert Subclass\_..." when isolating an interface](https://www.ruby-forum.com/t/fwd-cant-convert-subclass-when-isolating-an-interface/192752)
**Author:** [@barby](https://www.ruby-forum.com/u/barby)\ **Replies:** 0\ **Last updated:** [August 4, 2010, 11:41pm UTC](https://www.ruby-forum.com/t/fwd-cant-convert-subclass-when-isolating-an-interface/192752 "2010-08-04T23:41:20Z")
I just looked at your sample project It’s best to require spec before caricature because caricature hooks into spec The IHomeRepository interface is empty. Try adding a method to that and see if it still occurs. y… --- ## [Default arguments problem](https://www.ruby-forum.com/t/default-arguments-problem/192746)
**Author:** [@amiref](https://www.ruby-forum.com/u/amiref)\ **Replies:** 2\ **Last updated:** [August 4, 2010, 10:48pm UTC](https://www.ruby-forum.com/t/default-arguments-problem/192746 "2010-08-04T22:48:04Z")
Hi How can I have a method with 3 arguments so that only second argument is a default argument for example: def sum(p,q=2,r) puts p+q+r end (I want to use from this method with only 2 arguments : first argument a… --- ## [A little problem](https://www.ruby-forum.com/t/a-little-problem/192745)
**Author:** [@amiref](https://www.ruby-forum.com/u/amiref)\ **Replies:** 3\ **Last updated:** [August 4, 2010, 10:18pm UTC](https://www.ruby-forum.com/t/a-little-problem/192745 "2010-08-04T22:18:12Z")
Hi What is difference between these 2 codes ? (when I executed these codes result was the same ) def welcome1( name ) puts “Hello#{name}” end def welcome2( name ) puts “Hello”+name end welcome1( Amir ) welcome… --- ## [Duplicate loader statement when unit testing](https://www.ruby-forum.com/t/duplicate-loader-statement-when-unit-testing/192608)
**Author:** [@soderic](https://www.ruby-forum.com/u/soderic)\ **Replies:** 2\ **Last updated:** [August 4, 2010, 9:58pm UTC](https://www.ruby-forum.com/t/duplicate-loader-statement-when-unit-testing/192608 "2010-08-04T21:58:58Z")
Hey everyone, I’m running JRuby 1.5.1 and Shoulda with Test::Unit. I’m getting some weird duplication on my test output that is cluttering up my screen and making it harder to read the test results. I’m wondering if a… --- ## [Get rid of extra, blank lines via html parsing?](https://www.ruby-forum.com/t/get-rid-of-extra-blank-lines-via-html-parsing/192691)
**Author:** [@mickey](https://www.ruby-forum.com/u/mickey)\ **Replies:** 4\ **Last updated:** [August 4, 2010, 9:29pm UTC](https://www.ruby-forum.com/t/get-rid-of-extra-blank-lines-via-html-parsing/192691 "2010-08-04T21:29:01Z")
So I am trying to get some information from a snippet of html (\ \ - Pastebin.com), and im using doc.inner\_text to get the important parts, but when I do so I get… --- ## [Questions and comments about (java) extensions](https://www.ruby-forum.com/t/questions-and-comments-about-java-extensions/192297)
**Author:** [@jeremyheiler](https://www.ruby-forum.com/u/jeremyheiler)\ **Replies:** 3\ **Last updated:** [August 4, 2010, 7:47pm UTC](https://www.ruby-forum.com/t/questions-and-comments-about-java-extensions/192297 "2010-08-04T19:47:44Z")
Hi all, In the process of porting the hitimes C extension to java I came up with a few questions along the way. I initially read Ola’s blog post\[1\] and then took a look at the built in extensions (WeakRef, Readline… --- ## [Call for Participation for 2010 Workshop on Scheme and Functional Programming](https://www.ruby-forum.com/t/call-for-participation-for-2010-workshop-on-scheme-and-functional-programming/192738)
**Author:** [@mrcfab3](https://www.ruby-forum.com/u/mrcfab3)\ **Replies:** 0\ **Last updated:** [August 4, 2010, 7:30pm UTC](https://www.ruby-forum.com/t/call-for-participation-for-2010-workshop-on-scheme-and-functional-programming/192738 "2010-08-04T19:30:45Z")
Here is the final program for the 2010 Workshop on Scheme and Functional Programming. For the abstracts please check the website (http://www.iro.umontreal.ca/~sfp2010). To take advantage of the early registration pri… --- ## [New gem to showcase JRuby](https://www.ruby-forum.com/t/new-gem-to-showcase-jruby/192668)
**Author:** [@bluetrust](https://www.ruby-forum.com/u/bluetrust)\ **Replies:** 5\ **Last updated:** [August 4, 2010, 6:59pm UTC](https://www.ruby-forum.com/t/new-gem-to-showcase-jruby/192668 "2010-08-04T18:59:08Z")
Hi all, I just released a gem that provides a nice little example of how to take advantage of JRuby’s ability to use a Java library when it makes sense. It’s not exactly a masterpiece, but it does demonstrate some te… --- ## [Jmx4r metaprogramming](https://www.ruby-forum.com/t/jmx4r-metaprogramming/192715)
**Author:** [@aidy](https://www.ruby-forum.com/u/aidy)\ **Replies:** 2\ **Last updated:** [August 4, 2010, 6:45pm UTC](https://www.ruby-forum.com/t/jmx4r-metaprogramming/192715 "2010-08-04T18:45:40Z")
Hi, I am attempting to use the jmx4r library to set an MBean attribute. From here: JMX the Ruby way with jmx4r It looks like jmx4r uses metaprogramming techniques which disposes with JMX method calls. However, I am … --- ## [Can't inline calendar for some reason](https://www.ruby-forum.com/t/cant-inline-calendar-for-some-reason/192734)
**Author:** [@grikdog](https://www.ruby-forum.com/u/grikdog)\ **Replies:** 0\ **Last updated:** [August 4, 2010, 5:46pm UTC](https://www.ruby-forum.com/t/cant-inline-calendar-for-some-reason/192734 "2010-08-04T17:46:25Z")
Can anyone tell a newbie why this doesn’t produce output in an Apache 2.2 cgi script? /usr/bin/calendar.each do |a| print a end I have nearly identical code that DOES work above and below this line, both, including d… [Previous page](https://www.ruby-forum.com/c/ruby/7.md?page=554) [Next page](https://www.ruby-forum.com/c/ruby/7.md?page=556)