# Ruby **URL:** https://www.ruby-forum.com/c/ruby/7.md?page=1081 [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:** 1082 --- ## [Trying to install a gem from a tarball and getting an exception](https://www.ruby-forum.com/t/trying-to-install-a-gem-from-a-tarball-and-getting-an-exception/142425)
**Author:** [@Jay\_McGaffigan](https://www.ruby-forum.com/u/Jay_McGaffigan)\ **Replies:** 2\ **Last updated:** [July 7, 2008, 10:16pm UTC](https://www.ruby-forum.com/t/trying-to-install-a-gem-from-a-tarball-and-getting-an-exception/142425 "2008-07-07T22:16:25Z")
Hi, I’m trying to install RCov without the native extension with JRuby 1.1.2. And I’m getting an exception. the steps I’m following are: get the rcov-0.8.1.2 tarball - http://rubyforge.org/frs/download.php/28270/… --- ## [MiniExiftool 0.7.0 released](https://www.ruby-forum.com/t/miniexiftool-0-7-0-released/142427)
**Author:** [@janfoeh](https://www.ruby-forum.com/u/janfoeh)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 10:00pm UTC](https://www.ruby-forum.com/t/miniexiftool-0-7-0-released/142427 "2008-07-07T22:00:36Z")
MiniExiftool version 0.7.0 released! http://miniexiftool.rubyforge.org/ MiniExiftool is a wrapper library for the Exiftool command-line application (www.sno.phy.queensu.ca/~phil/exiftool/) written by Phil Harvay. One… --- ## [July 14 Phoenix Ruby User Group Meeting](https://www.ruby-forum.com/t/july-14-phoenix-ruby-user-group-meeting/142419)
**Author:** [@byrnejb](https://www.ruby-forum.com/u/byrnejb)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 8:41pm UTC](https://www.ruby-forum.com/t/july-14-phoenix-ruby-user-group-meeting/142419 "2008-07-07T20:41:02Z")
July Phoenix Ruby U. Group Meeting Date: Monday, July 14, 2008 Time: 6:30 pm - at Saguaro branch Phoenix Public Library Place: Saguaro branch Phoenix Public Library 2808 N. 46th Street Phoenix, AZ 85008 IMPORTANT… --- ## [Ruby as a standard](https://www.ruby-forum.com/t/ruby-as-a-standard/142417)
**Author:** [@raker\_t](https://www.ruby-forum.com/u/raker_t)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 8:24pm UTC](https://www.ruby-forum.com/t/ruby-as-a-standard/142417 "2008-07-07T20:24:37Z")
“Matz plans to hand in the standard to the ISO (International Organization for Standardization), however, a concrete date has not yet been determined-only that it will “at least take a couple of years for standardiz… --- ## [Spec changes](https://www.ruby-forum.com/t/spec-changes/142347)
**Author:** [@ksunair](https://www.ruby-forum.com/u/ksunair)\ **Replies:** 5\ **Last updated:** [July 7, 2008, 8:06pm UTC](https://www.ruby-forum.com/t/spec-changes/142347 "2008-07-07T20:06:29Z")
I think the following spec is wrong for FileOps.dirname  It is     File.dirname(’/////’).should == ‘/’  but it should be     File.dirname(’/////’).should == ‘//’  If it is my misunderstanding, plea… --- ## [Meta\_data from Raw Image files and \*.psd files](https://www.ruby-forum.com/t/meta-data-from-raw-image-files-and-psd-files/142412)
**Author:** [@davidstokar](https://www.ruby-forum.com/u/davidstokar)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 7:16pm UTC](https://www.ruby-forum.com/t/meta-data-from-raw-image-files-and-psd-files/142412 "2008-07-07T19:16:42Z")
Hi I am needing to extract metadata from image files primarily canon .CR2 and photoshop.psd files so I can use the metadata in a mysql database. Does anyone know of any available routines to help with the task… I wo… --- ## [Vancouver.rb Open Ruby Hack Night #5 - Today 7pm - Whenever (9ish) @ Waves Coffee](https://www.ruby-forum.com/t/vancouver-rb-open-ruby-hack-night-5-today-7pm-whenever-9ish-waves-coffee/142411)
**Author:** [@gerald\_b](https://www.ruby-forum.com/u/gerald_b)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 7:16pm UTC](https://www.ruby-forum.com/t/vancouver-rb-open-ruby-hack-night-5-today-7pm-whenever-9ish-waves-coffee/142411 "2008-07-07T19:16:07Z")
Hello, Are you a Rubyist in the greater Vancouver metro in British Columbia (B.c.) on Canada’s West Coast in the Americas? Join us and drop by for the weekly Vancouver.rb Open Ruby Hack Night at Waves Coffee (offerin… --- ## [Issue with TestClassBuilder](https://www.ruby-forum.com/t/issue-with-testclassbuilder/142410)
**Author:** [@Brendan\_Grainger](https://www.ruby-forum.com/u/Brendan_Grainger)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 7:12pm UTC](https://www.ruby-forum.com/t/issue-with-testclassbuilder/142410 "2008-07-07T19:12:36Z")
Hi, Sorry if this is a dumb question, but does anyone know if this test should work? I am trying to play with generating class files using Compiler::Builder and was using the test\_class\_builder for inspiration. Howev… --- ## [Mysterious memory corruption, very confused](https://www.ruby-forum.com/t/mysterious-memory-corruption-very-confused/141685)
**Author:** [@Seebs](https://www.ruby-forum.com/u/Seebs)\ **Replies:** 10\ **Last updated:** [July 7, 2008, 6:52pm UTC](https://www.ruby-forum.com/t/mysterious-memory-corruption-very-confused/141685 "2008-07-07T18:52:41Z")
ruby 1.8.7-p22, OS X 10.4.mumble, PostgreSQL 8.3.1, ruby-pg 2008-03-18. I get random data corruption when trying to execute queries. The data corruption comes and goes VERY unpredictably. I’ve narrowed it down to a s… --- ## [Another logical precedence question](https://www.ruby-forum.com/t/another-logical-precedence-question/142408)
**Author:** [@S-jb](https://www.ruby-forum.com/u/S-jb)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 6:06pm UTC](https://www.ruby-forum.com/t/another-logical-precedence-question/142408 "2008-07-07T18:06:22Z")
I am used to using the following shortcut: value = ARGV.shift or usage where usage is a method. However, I recently ran into a situation where the following did not work (as expected, anyway): $user\_type = ARGV.shif… --- ## [Hawthorne Press/IRHG site down?](https://www.ruby-forum.com/t/hawthorne-press-irhg-site-down/142407)
**Author:** [@MSEdward\_SEdS\_Bora](https://www.ruby-forum.com/u/MSEdward_SEdS_Bora)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 5:24pm UTC](https://www.ruby-forum.com/t/hawthorne-press-irhg-site-down/142407 "2008-07-07T17:24:09Z")
Is the IRHG site down? I’m getting 404s, etc. M. Edward (Ed) Borasky http://ruby-perspectives.blogspot.com/ “A mathematician is a machine for turning coffee into theorems.” – Alfréd Rényi via Paul ErdÅ‘s --- ## ["No.9".succ == "Np.0"](https://www.ruby-forum.com/t/no-9-succ-np-0/140425)
**Author:** [@unknown](https://www.ruby-forum.com/u/unknown)\ **Replies:** 3\ **Last updated:** [July 7, 2008, 4:30pm UTC](https://www.ruby-forum.com/t/no-9-succ-np-0/140425 "2008-07-07T16:30:44Z")
e$B$k$S$-$A$G$9!#e(B e$B8=\>u$Ne(BString#succe$B$O0J2\<$N$h$&$J5sF0$K$J$k$N$G$9$,!"e(B e$BHs1Q?t;z$r69$s$@?t;z$H1Q;z$N7+$j\>e$,$j$OJL$K$7$?$\[$&$,$$$$$N$G$O$J$$$G$7$g$&$+!)e(B e$B$D$^$j!Ve(B"No.10"e$B!W$rJV$9$\[$&$,\<+A3$@$… --- ## [Ruby cache](https://www.ruby-forum.com/t/ruby-cache/141690)
**Author:** [@bbnnt](https://www.ruby-forum.com/u/bbnnt)\ **Replies:** 6\ **Last updated:** [July 7, 2008, 3:49pm UTC](https://www.ruby-forum.com/t/ruby-cache/141690 "2008-07-07T15:49:05Z")
Hi, would like to know if anybody has some information or experience about using ruby cache (PUPA: Ruby/Cache). Seems to be great, sometimes rails plugins seems to be heavy; as about, does it integrates with rails eas… --- ## [Origin of a definition](https://www.ruby-forum.com/t/origin-of-a-definition/142351)
**Author:** [@ole](https://www.ruby-forum.com/u/ole)\ **Replies:** 1\ **Last updated:** [July 7, 2008, 3:40pm UTC](https://www.ruby-forum.com/t/origin-of-a-definition/142351 "2008-07-07T15:40:51Z")
Is there any way to find out the filename and line number of a definition such as a class or method at runtime? --- ## [Does Ruby have any advantage over Python to create semantic applications?](https://www.ruby-forum.com/t/does-ruby-have-any-advantage-over-python-to-create-semantic-applications/142231)
**Author:** [@Costan](https://www.ruby-forum.com/u/Costan)\ **Replies:** 9\ **Last updated:** [July 7, 2008, 3:31pm UTC](https://www.ruby-forum.com/t/does-ruby-have-any-advantage-over-python-to-create-semantic-applications/142231 "2008-07-07T15:31:28Z")
Hi all, I’m trying to choose between Ruby of Python as almost my first programming language (I started more that 10 years ago to study Computer Science but I changed major). The reason is that I want to create an app… --- ## [Re: inheritance v passing object through the constructor](https://www.ruby-forum.com/t/re-inheritance-v-passing-object-through-the-constructor/142381)
**Author:** [@unknown](https://www.ruby-forum.com/u/unknown)\ **Replies:** 1\ **Last updated:** [July 7, 2008, 2:59pm UTC](https://www.ruby-forum.com/t/re-inheritance-v-passing-object-through-the-constructor/142381 "2008-07-07T14:59:14Z")
box ||= Box.new class ErrorBox def initialize(box) end end That won’t do anything as written; the two ‘box’ local variables are distinct. I’m guessing you mean something like this: class ErrorBox def initializ… --- ## [Inheritance v passing object through the constructor](https://www.ruby-forum.com/t/inheritance-v-passing-object-through-the-constructor/142379)
**Author:** [@aidy](https://www.ruby-forum.com/u/aidy)\ **Replies:** 1\ **Last updated:** [July 7, 2008, 2:35pm UTC](https://www.ruby-forum.com/t/inheritance-v-passing-object-through-the-constructor/142379 "2008-07-07T14:35:39Z")
Hi, Could anyone please tell me what the difference would be of inheriting a class versus passing that class\\object through the initialize method? class ErrorBox \< Box end v box ||= Box.new class ErrorBox def in… --- ## [Rubygems won't run on WinXP after system update](https://www.ruby-forum.com/t/rubygems-wont-run-on-winxp-after-system-update/142331)
**Author:** [@arturaz](https://www.ruby-forum.com/u/arturaz)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 12:36pm UTC](https://www.ruby-forum.com/t/rubygems-wont-run-on-winxp-after-system-update/142331 "2008-07-07T12:36:34Z")
hello. Anyone tried to upgrade rubygems from windows xp? I downloaded fresh ruby 1.8.6 installer, installed, did gem update –system and now whenever I try anything, i get this: C:\\Documents and Settings\\ArtÅ«ras\>gem … --- ## [Fetch 6 records from a table randomly](https://www.ruby-forum.com/t/fetch-6-records-from-a-table-randomly/142368)
**Author:** [@ganana\_srishti](https://www.ruby-forum.com/u/ganana_srishti)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 12:09pm UTC](https://www.ruby-forum.com/t/fetch-6-records-from-a-table-randomly/142368 "2008-07-07T12:09:57Z")
i have one table “documents” and i want to fetch 6 records randomly is there any solution reply me Thanx Pragash --- ## [Getting Folder Size](https://www.ruby-forum.com/t/getting-folder-size/142183)
**Author:** [@owc](https://www.ruby-forum.com/u/owc)\ **Replies:** 14\ **Last updated:** [July 7, 2008, 11:58am UTC](https://www.ruby-forum.com/t/getting-folder-size/142183 "2008-07-07T11:58:35Z")
When I use File.size(“C:/ruby”), all it returns is 0. But for files it does work fine. So is there a way to calculate folder size? --- ## [Re: Why can't I return "Threads.list" Array in DRb?](https://www.ruby-forum.com/t/re-why-cant-i-return-threads-list-array-in-drb/142367)
**Author:** [@unknown](https://www.ruby-forum.com/u/unknown)\ **Replies:** 0\ **Last updated:** [July 7, 2008, 11:51am UTC](https://www.ruby-forum.com/t/re-why-cant-i-return-threads-list-array-in-drb/142367 "2008-07-07T11:51:31Z")
This might be helpful: http://rubygarden.org/Ruby/page/show/DRbTutorial Scroll down to “Why does the client run ‘DRb.start\_service’?” and read from there. --- ## [Amalgalite 0.2.1 Released](https://www.ruby-forum.com/t/amalgalite-0-2-1-released/142291)
**Author:** [@jeremyheiler](https://www.ruby-forum.com/u/jeremyheiler)\ **Replies:** 3\ **Last updated:** [July 7, 2008, 11:25am UTC](https://www.ruby-forum.com/t/amalgalite-0-2-1-released/142291 "2008-07-07T11:25:46Z")
A quick bugfix release for amalgalite. If you had a bug running amalgalite with an error similar to: amalgalite-0.2.0/ext/amalgalite3.so: undefined symbol: pthread\_mutexattr\_init That is now fixed. This has to do … --- ## [Memory Leak with Certain Script Exceptions](https://www.ruby-forum.com/t/memory-leak-with-certain-script-exceptions/142289)
**Author:** [@acampos](https://www.ruby-forum.com/u/acampos)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 10:23am UTC](https://www.ruby-forum.com/t/memory-leak-with-certain-script-exceptions/142289 "2008-07-07T10:23:13Z")
Hi, I use the IronRuby scripting engine in a long running server process and came across an issue where the memory utilisation of the process started steadily rising in line with a memory leak. The server process is … --- ## [MySQL/Ruby Module](https://www.ruby-forum.com/t/mysql-ruby-module/142247)
**Author:** [@jturney](https://www.ruby-forum.com/u/jturney)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 9:45am UTC](https://www.ruby-forum.com/t/mysql-ruby-module/142247 "2008-07-07T09:45:32Z")
After downloading the mysql-ruby-2.8pre4 from \[http://tmtm.org/downloads/mysql/ruby/\]…I stuck it into C:\\ruby\\lib\\mysql-ruby-2.8pre4. The instructions on MySQL/Ruby says I need to run the command % ruby extconf.rb: c… --- ## [Accessing variables when loading a file to irb](https://www.ruby-forum.com/t/accessing-variables-when-loading-a-file-to-irb/142332)
**Author:** [@i-blis](https://www.ruby-forum.com/u/i-blis)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 7:36am UTC](https://www.ruby-forum.com/t/accessing-variables-when-loading-a-file-to-irb/142332 "2008-07-07T07:36:14Z")
Hi I’m new to Ruby. Coming from Perl I really do enjoy the syntax and… irb. When I load a file, classes are loaded but not the variables set in the file. My file ends like that : fields = Set.new bibfile.each do … --- ## [Array Combinations](https://www.ruby-forum.com/t/array-combinations/142349)
**Author:** [@ganana\_srishti](https://www.ruby-forum.com/u/ganana_srishti)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 7:19am UTC](https://www.ruby-forum.com/t/array-combinations/142349 "2008-07-07T07:19:16Z")
Hi, I want to find array combinations is there any way find combinations in array --- ## [Basic ruby Question](https://www.ruby-forum.com/t/basic-ruby-question/142180)
**Author:** [@Deepak\_G](https://www.ruby-forum.com/u/Deepak_G)\ **Replies:** 4\ **Last updated:** [July 7, 2008, 6:57am UTC](https://www.ruby-forum.com/t/basic-ruby-question/142180 "2008-07-07T06:57:00Z")
Hello, I didn’t understand the following concept. \*class Universe private def self.private\_method p “=========Hello world=======” end end Universe.private\_method =\> “=========Hello world=======” \* How come I g… --- ## [Netbeans, Javafx & JRuby](https://www.ruby-forum.com/t/netbeans-javafx-jruby/142340)
**Author:** [@paulf](https://www.ruby-forum.com/u/paulf)\ **Replies:** 1\ **Last updated:** [July 7, 2008, 6:28am UTC](https://www.ruby-forum.com/t/netbeans-javafx-jruby/142340 "2008-07-07T06:28:57Z")
In the search for the “perfect” gui for ruby, my latest area of investigation is in the javafx world. Is it possible to use JRuby with javafx in the netbeans environment? The following code copied into a netbeans jfx … --- ## [Creating dynamic hashmap](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179)
**Author:** [@sameera](https://www.ruby-forum.com/u/sameera)\ **Replies:** 5\ **Last updated:** [July 7, 2008, 1:19am UTC](https://www.ruby-forum.com/t/creating-dynamic-hashmap/142179 "2008-07-07T01:19:38Z")
Hi All, I have a question about creating a dynamic hash map. I’m using “gruff” and in that , the lables parameter should be like this (as in example) g.labels = { 0 =\> ‘Mon’, 2 =\> ‘Wed’, 4 =\> ‘Fri’, 6 =\> ‘Sun’ } in … --- ## [Re: spec question](https://www.ruby-forum.com/t/re-spec-question/142299)
**Author:** [@raker\_t](https://www.ruby-forum.com/u/raker_t)\ **Replies:** 1\ **Last updated:** [July 7, 2008, 12:15am UTC](https://www.ruby-forum.com/t/re-spec-question/142299 "2008-07-07T00:15:56Z")
I’d say yes. You can commit to your local repository and use “git format-patch -1” to make the patches. Change the number to match the number of commits you have made. In addition, remember that rake spec runs the tes… [Previous page](https://www.ruby-forum.com/c/ruby/7.md?page=1080) [Next page](https://www.ruby-forum.com/c/ruby/7.md?page=1082)