# Ruby

**URL:** https://www.ruby-forum.com/c/ruby/7.md?page=642

[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:** 643

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## [Bug in #map](https://www.ruby-forum.com/t/bug-in-map/183377)

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**Author:** [@cremes](https://www.ruby-forum.com/u/cremes)\
**Replies:** 6\
**Last updated:** [March 7, 2010, 2:42pm UTC](https://www.ruby-forum.com/t/bug-in-map/183377 "2010-03-07T14:42:17Z")

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I have run across a bug in Enumerable#map. It affects 1.5-dev but is okay in 1.4.0. Unfortunately, I can’t figure out how to reproduce it to a simple example. I’ll show in pseudo-code what I’m doing and the incorrect …

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## [Ksh versions of bash scripts](https://www.ruby-forum.com/t/ksh-versions-of-bash-scripts/184659)

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**Author:** [@matt](https://www.ruby-forum.com/u/matt)\
**Replies:** 7\
**Last updated:** [March 7, 2010, 2:18pm UTC](https://www.ruby-forum.com/t/ksh-versions-of-bash-scripts/184659 "2010-03-07T14:18:51Z")

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Hi, Just wondering if anyone has created ksh versions of the bash scripts. I also noticed that for JRuby 1.5, you are looking at native binaries for the Unix launch scripts, will this be just for Intel/Linux or will …

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## [In \`require': no such file found --mysql(Load Error)](https://www.ruby-forum.com/t/in-require-no-such-file-found-mysql-load-error/184480)

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**Author:** [@anbusivakani](https://www.ruby-forum.com/u/anbusivakani)\
**Replies:** 13\
**Last updated:** [March 7, 2010, 2:09pm UTC](https://www.ruby-forum.com/t/in-require-no-such-file-found-mysql-load-error/184480 "2010-03-07T14:09:29Z")

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Hi friends … I am using netbeans IDE for JRuby. While trying for MySQL connection am getting the load error. How to rectify this?

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## [Ffi-mysql 0.0.1](https://www.ruby-forum.com/t/ffi-mysql-0-0-1/184723)

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**Author:** [@lobbr](https://www.ruby-forum.com/u/lobbr)\
**Replies:** 0\
**Last updated:** [March 7, 2010, 11:55am UTC](https://www.ruby-forum.com/t/ffi-mysql-0-0-1/184723 "2010-03-07T11:55:29Z")

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ffi-mysql version 0.0.1 by Frank F. http://bitbucket.org/lyro/ffi-mysql == DESCRIPTION Pure Ruby FFI interface to MySQL. == CHANGES 1 major enhancement mostly compatible to MySQL/Ruby == PROBLEMS: does not work…

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## [Basic Rails 3 app works (FYI review)](https://www.ruby-forum.com/t/basic-rails-3-app-works-fyi-review/184699)

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**Author:** [@Shri\_B](https://www.ruby-forum.com/u/Shri_B)\
**Replies:** 3\
**Last updated:** [March 7, 2010, 4:26am UTC](https://www.ruby-forum.com/t/basic-rails-3-app-works-fyi-review/184699 "2010-03-07T04:26:33Z")

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tfpt review “/shelveset:r3;REDMOND\\sborde” Add a stub implementation of YAML.add\_builtin\_type. With this fix, I can create a Rails 3 app, add a controller, start the server, and request the main page! See Ruby on Rai…

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## [Please help. what does mean \<\<](https://www.ruby-forum.com/t/please-help-what-does-mean/184692)

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**Author:** [@superski](https://www.ruby-forum.com/u/superski)\
**Replies:** 2\
**Last updated:** [March 6, 2010, 9:40pm UTC](https://www.ruby-forum.com/t/please-help-what-does-mean/184692 "2010-03-06T21:40:30Z")

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I have to translate code from ruby to .net And I dont understand what means \<\< in the code. Its simple I know but please do not delete question and answer the question please def eval\_op(op, val1, val2, expr1, expr2, …

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## [\[Bug #2752\] File path encoding on mac os x and windows](https://www.ruby-forum.com/t/bug-2752-file-path-encoding-on-mac-os-x-and-windows/183618)

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**Author:** [@Yusuke\_E](https://www.ruby-forum.com/u/Yusuke_E)\
**Replies:** 1\
**Last updated:** [March 6, 2010, 6:23pm UTC](https://www.ruby-forum.com/t/bug-2752-file-path-encoding-on-mac-os-x-and-windows/183618 "2010-03-06T18:23:07Z")

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Bug #2752: File path encoding on mac os x and windows http://redmine.ruby-lang.org/issues/show/2752 e$B5/I\<\<Te(B: Yusuke E. e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Urgent e$BC4Ev\<Te(B: Yui NARUSE, e$B%+%F%4%je(B: M17N,…

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## [Cannot allocate memory (Errno::ENOMEM)](https://www.ruby-forum.com/t/cannot-allocate-memory-errno-enomem/184658)

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**Author:** [@tomx](https://www.ruby-forum.com/u/tomx)\
**Replies:** 1\
**Last updated:** [March 6, 2010, 3:50pm UTC](https://www.ruby-forum.com/t/cannot-allocate-memory-errno-enomem/184658 "2010-03-06T15:50:22Z")

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Hello, I’m using a ruby to setup an ec2 instance as part of a bootscript. The ruby script runs out of memory and exits with an error. I believe this may be related to the fact that the ruby script makes a lot of sys…

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## [JRuby embedded in an Eclipse plugin (with gems in a jar)](https://www.ruby-forum.com/t/jruby-embedded-in-an-eclipse-plugin-with-gems-in-a-jar/184620)

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**Author:** [@ggironda](https://www.ruby-forum.com/u/ggironda)\
**Replies:** 4\
**Last updated:** [March 6, 2010, 12:20pm UTC](https://www.ruby-forum.com/t/jruby-embedded-in-an-eclipse-plugin-with-gems-in-a-jar/184620 "2010-03-06T12:20:17Z")

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Environment: Jruby 1.4, Eclipse 3.5 Hi, I tried to use two new great features of JRuby 1.4.0 (JSR223 integration and Gems in a jar) inside an Eclipse plugin but ran into some problems. Here’s the list and the workar…

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## [Code Review: SymToProc](https://www.ruby-forum.com/t/code-review-symtoproc/184669)

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**Author:** [@grujildo](https://www.ruby-forum.com/u/grujildo)\
**Replies:** 4\
**Last updated:** [March 6, 2010, 8:31am UTC](https://www.ruby-forum.com/t/code-review-symtoproc/184669 "2010-03-06T08:31:28Z")

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tfpt review “/shelveset:SymToProc;REDMOND\\tomat” Comment : Implements Symbol#to\_proc Tomas

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## [Code Review: Encs2](https://www.ruby-forum.com/t/code-review-encs2/184668)

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**Author:** [@grujildo](https://www.ruby-forum.com/u/grujildo)\
**Replies:** 1\
**Last updated:** [March 6, 2010, 5:39am UTC](https://www.ruby-forum.com/t/code-review-encs2/184668 "2010-03-06T05:39:22Z")

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tfpt review “/shelveset:Encs2;REDMOND\\tomat” Comment : Fixes bunch of encoding issues including http://ironruby.codeplex.com/WorkItem/View.aspx?WorkItemId=3920. Fixes handling of DST transitions in Time operators. …

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## [On what of these books is better to start to study Ruby?](https://www.ruby-forum.com/t/on-what-of-these-books-is-better-to-start-to-study-ruby/184636)

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**Author:** [@refermaker](https://www.ruby-forum.com/u/refermaker)\
**Replies:** 11\
**Last updated:** [March 6, 2010, 4:25am UTC](https://www.ruby-forum.com/t/on-what-of-these-books-is-better-to-start-to-study-ruby/184636 "2010-03-06T04:25:31Z")

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I have 3 books: The Ruby Way: Solutions and Techniques in Ruby P.ming, Second Edition (2006 год, версия 1.8…) Beginning Ruby: From Novice to Professional, Second Edition (2009 год, 1.9) Programming…

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## [Camera, Graphic and Mouse Class?](https://www.ruby-forum.com/t/camera-graphic-and-mouse-class/184665)

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**Author:** [@nofortee](https://www.ruby-forum.com/u/nofortee)\
**Replies:** 0\
**Last updated:** [March 6, 2010, 3:46am UTC](https://www.ruby-forum.com/t/camera-graphic-and-mouse-class/184665 "2010-03-06T03:46:36Z")

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I’m new in Ruby, please help me out with this… I want to implement some gesture input (e.g. eviacam ) by using web cam as an input device and imitate mouse event to give a command to os. Is there any possible to done …

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## [Can I do a query SQL with various tables using find\_by\_sql?](https://www.ruby-forum.com/t/can-i-do-a-query-sql-with-various-tables-using-find-by-sql/184651)

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**Author:** [@jorgegetafe](https://www.ruby-forum.com/u/jorgegetafe)\
**Replies:** 1\
**Last updated:** [March 5, 2010, 11:35pm UTC](https://www.ruby-forum.com/t/can-i-do-a-query-sql-with-various-tables-using-find-by-sql/184651 "2010-03-05T23:35:14Z")

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Hello. I need to do a query with various tables, but I want to use something like find\_by\_sql. It’s say, i want to make the next query: SELECT field\_table1,field\_table1,field\_table2 FROM table1, table2 WHERE table1…

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## [Upper case global variable?](https://www.ruby-forum.com/t/upper-case-global-variable/184645)

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**Author:** [@ngambek2003](https://www.ruby-forum.com/u/ngambek2003)\
**Replies:** 3\
**Last updated:** [March 5, 2010, 7:49pm UTC](https://www.ruby-forum.com/t/upper-case-global-variable/184645 "2010-03-05T19:49:23Z")

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Is there a restriction when naming global variables to be shared between java and jruby? I’m using the jsr223 way and if I do engine.put(“Logger”, logger), from jruby, $Logger is nil. - Begins with Upper case If I …

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## [\[Bug #2792\] String#to\_f on Ruby-1.8.6-p399](https://www.ruby-forum.com/t/bug-2792-string-to-f-on-ruby-1-8-6-p399/184131)

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**Author:** [@Masao\_M](https://www.ruby-forum.com/u/Masao_M)\
**Replies:** 3\
**Last updated:** [March 5, 2010, 7:21pm UTC](https://www.ruby-forum.com/t/bug-2792-string-to-f-on-ruby-1-8-6-p399/184131 "2010-03-05T19:21:17Z")

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Bug #2792: String#to\_f on Ruby-1.8.6-p399 http://redmine.ruby-lang.org/issues/show/2792 e$B5/I\<\<Te(B: Masao M. e$B%9%F!\<%?%9e(B: Open, e$BM%@hEYe(B: Normal ruby -v: ruby 1.8.6 (2010-02-05 patchlevel 399) \[x86\_64-linu…

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## [CentOS 5 and Ruby 1.9.1 - conflict with 1.8.6](https://www.ruby-forum.com/t/centos-5-and-ruby-1-9-1-conflict-with-1-8-6/184644)

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**Author:** [@devaulw](https://www.ruby-forum.com/u/devaulw)\
**Replies:** 1\
**Last updated:** [March 5, 2010, 7:06pm UTC](https://www.ruby-forum.com/t/centos-5-and-ruby-1-9-1-conflict-with-1-8-6/184644 "2010-03-05T19:06:04Z")

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Hey all, I’m running CentOS 5.4 - I tried to use yum to install ruby, but the only version available was 1.8.5. I wanted 1.9.1, so I installed it from source and everything works fine. My trouble is that now whenever…

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## [A gem for handling temporary file(s)?](https://www.ruby-forum.com/t/a-gem-for-handling-temporary-file-s/184469)

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**Author:** [@alby](https://www.ruby-forum.com/u/alby)\
**Replies:** 20\
**Last updated:** [March 5, 2010, 5:40pm UTC](https://www.ruby-forum.com/t/a-gem-for-handling-temporary-file-s/184469 "2010-03-05T17:40:00Z")

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I’m writing a program that needs to generate two or three temporary files. (Specifically: my program runs a shell command and I need to pass the shell command a path to a non-existing file which it will dump data to.) …

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## [\[ANN\] Ruby In Steel 1.5](https://www.ruby-forum.com/t/ann-ruby-in-steel-1-5/183114)

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**Author:** [@huw](https://www.ruby-forum.com/u/huw)\
**Replies:** 1\
**Last updated:** [March 5, 2010, 5:03pm UTC](https://www.ruby-forum.com/t/ann-ruby-in-steel-1-5/183114 "2010-03-05T17:03:04Z")

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SapphireSteel Software today released the latest version of the Ruby In Steel IDE for developing Ruby and Rails applications with Visual Studio. Ruby In Steel ‘Developer Edition’ 1.5 provides integrated edit-and-ru…

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## [JRuby rake not working!](https://www.ruby-forum.com/t/jruby-rake-not-working/182992)

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**Author:** [@tutiplain](https://www.ruby-forum.com/u/tutiplain)\
**Replies:** 3\
**Last updated:** [March 5, 2010, 4:54pm UTC](https://www.ruby-forum.com/t/jruby-rake-not-working/182992 "2010-03-05T16:54:51Z")

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Hello all, I am trying out Rails using JRuby. I set up a Rails app using netbeans, and installed all the necessary gems, including activerecord-jdbc-adapter, and rake. However, whenever I try to run a migration usi…

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## [Issue with DateTime#to\_date in active\_support](https://www.ruby-forum.com/t/issue-with-datetime-to-date-in-active-support/184530)

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**Author:** [@patrik](https://www.ruby-forum.com/u/patrik)\
**Replies:** 3\
**Last updated:** [March 5, 2010, 3:55pm UTC](https://www.ruby-forum.com/t/issue-with-datetime-to-date-in-active-support/184530 "2010-03-05T15:55:05Z")

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Hi, I just got bitten by the issue explained on this link: Has anyone else seen this? Is it possible it’s a jruby issue and not a rails issue? It’s not clear to me since I’m still trying to get a MRI 1.8.7 setup c…

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## [System Stats from Ruby?](https://www.ruby-forum.com/t/system-stats-from-ruby/184599)

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**Author:** [@nickh](https://www.ruby-forum.com/u/nickh)\
**Replies:** 2\
**Last updated:** [March 5, 2010, 3:28pm UTC](https://www.ruby-forum.com/t/system-stats-from-ruby/184599 "2010-03-05T15:28:30Z")

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I am new to ruby but am working hard to learn all i can. Is there a way to get system information from ruby on windows? I am looking to get some data to make a system monitor type of thing. Data like conky or samurize…

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## [The desktop application on Ruby](https://www.ruby-forum.com/t/the-desktop-application-on-ruby/184621)

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**Author:** [@refermaker](https://www.ruby-forum.com/u/refermaker)\
**Replies:** 1\
**Last updated:** [March 5, 2010, 2:14pm UTC](https://www.ruby-forum.com/t/the-desktop-application-on-ruby/184621 "2010-03-05T14:14:35Z")

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Greetings! At me a question - whether it is possible to create the desktop application (I can be wrong it I name) in language Ruby. In my understanding the desktop appendix is, for example, the antivirus or other prog…

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## [Webrick hangs following periods of inactivity](https://www.ruby-forum.com/t/webrick-hangs-following-periods-of-inactivity/184633)

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**Author:** [@mattocks](https://www.ruby-forum.com/u/mattocks)\
**Replies:** 0\
**Last updated:** [March 5, 2010, 2:13pm UTC](https://www.ruby-forum.com/t/webrick-hangs-following-periods-of-inactivity/184633 "2010-03-05T14:13:18Z")

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I’m using WEBrick as my webserver with Redmine. I start the WEBrick server in the morning using the command script/server webrick -e production. The server starts and I am able to access the contents of the server t…

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## [Code Review: MiscStrings](https://www.ruby-forum.com/t/code-review-miscstrings/184410)

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**Author:** [@grujildo](https://www.ruby-forum.com/u/grujildo)\
**Replies:** 1\
**Last updated:** [March 5, 2010, 11:29am UTC](https://www.ruby-forum.com/t/code-review-miscstrings/184410 "2010-03-05T11:29:19Z")

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tfpt review “/shelveset:MiscStrings;REDMOND\\tomat” A simple DLR Console Shell change: The version printed by the console host now recognizes Mono correctly. Ruby changes: Ignores UTF8 BOM in 1.8 mode unless $KCODE is…

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## [RedCloth, JRuby and national characters](https://www.ruby-forum.com/t/redcloth-jruby-and-national-characters/184619)

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**Author:** [@Claus\_Folke\_B](https://www.ruby-forum.com/u/Claus_Folke_B)\
**Replies:** 0\
**Last updated:** [March 5, 2010, 9:44am UTC](https://www.ruby-forum.com/t/redcloth-jruby-and-national-characters/184619 "2010-03-05T09:44:56Z")

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Hi, I posted this in the RedCloth forum but noone has replied. Anyone in this forum? http://www.ruby-forum.com/topic/204905 Claus

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## [Outputting to a string](https://www.ruby-forum.com/t/outputting-to-a-string/184612)

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**Author:** [@alby](https://www.ruby-forum.com/u/alby)\
**Replies:** 2\
**Last updated:** [March 5, 2010, 9:19am UTC](https://www.ruby-forum.com/t/outputting-to-a-string/184612 "2010-03-05T09:19:22Z")

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I have a function that generates some textual data that I capture into a string: def gen\_data(output, …) … output \<\< “… some data …” … end s = ‘’ gen\_data(s, …) I was wondering if instead it’s possible to use a …

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## [Archflags for compiling gems 64 bit](https://www.ruby-forum.com/t/archflags-for-compiling-gems-64-bit/184593)

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**Author:** [@dale8458](https://www.ruby-forum.com/u/dale8458)\
**Replies:** 2\
**Last updated:** [March 5, 2010, 1:46am UTC](https://www.ruby-forum.com/t/archflags-for-compiling-gems-64-bit/184593 "2010-03-05T01:46:48Z")

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Hi, I am trying to understand if the archflags=’-arch x86\_64’ flag is used both in Linux and OSX or is this a OS X only flag. I want to make sure I compile gems correctly. I am also working with the RVM scripts to …

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## [Google AI Challenge at U of Waterloo](https://www.ruby-forum.com/t/google-ai-challenge-at-u-of-waterloo/183012)

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**Author:** [@Forthminder](https://www.ruby-forum.com/u/Forthminder)\
**Replies:** 10\
**Last updated:** [March 5, 2010, 12:55am UTC](https://www.ruby-forum.com/t/google-ai-challenge-at-u-of-waterloo/183012 "2010-03-05T00:55:27Z")

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Contest runs from 4 February to 26 February 2010. You may choose a programming language, such as Java, C++, Python, Ruby or Haskell. See details at http://csclub.uwaterloo.ca/contest/problem\_description.php Bonne Ch…

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## [Unable to run trunk](https://www.ruby-forum.com/t/unable-to-run-trunk/184588)

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**Author:** [@rogerdpack](https://www.ruby-forum.com/u/rogerdpack)\
**Replies:** 4\
**Last updated:** [March 4, 2010, 11:48pm UTC](https://www.ruby-forum.com/t/unable-to-run-trunk/184588 "2010-03-04T23:48:43Z")

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get this on two different computers with clean builds… C:\\dev\\ruby\\downloads\\jruby\\bin\>jruby -v -e ‘’ This application has requested the Runtime to terminate it in an unusual way. Please contact the application’s sup…

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