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  • Writing .NET in dynamic language?

    - by tillda
    I'm confused by the possibility of writing .NET in dynamic languages, such as (Iron)Ruby. Particularly, I've seen code in IronRuby that used generics (...foo[String]), but I'm not aware of this feature in Ruby as it seems nonsense to me in dynamic languages. So, when I write .NET app in IronRuby, how is it with type safety and compilation? I thought that it is just as dynamic as Ruby everywhere else. I thought that if the Ruby syntax is OK all the type checking would be done at the runtime. Also, as far as I know, .NET itself is type-oriented - there are classes that heavily utilize the mentioned generics. How is this handled? And what about delegates? In dynamic languages I can have almost function-spaghetti and sometimes, its just fine (like hacking UI in javascript). Or do I have to care even about generic delegates?

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  • how to get audio frequency data from a wave file?

    - by potlee
    I want to build a speech recognition engine in ruby. I know i'll never get there, doing it just for fun. I need to get data for the frequencies of the sound stored in a wav file to compare with data i already have of different sounds that i want to recognize. I will write the code in ruby but i dont think there are any libraries for this written in ruby, they would be too slow if there were any anyway. The good thing about ruby is I'll be able to use libraries for .net via IronRuby or Java via Jruby. How can i get the frequency data?

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  • Rails uses wrong class in belongs_to

    - by macsniper
    I have an application managing software tests and a class called TestResult: class TestResult < ActiveRecord::Base belongs_to :test_case, :class_name => "TestCase" end I'm right now migrating from Rails 1.x to 2.3.5. In Rails 1.x everything works fine. When trying to access the association in Rails 2.3.5, I get the following error: NoMethodError: undefined method 'find' for ActiveRecord::TestCase:Class from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/belongs_to_association.rb:49:in 'send' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/belongs_to_association.rb:49:in 'find_target' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:239:in 'load_target' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:112:in 'reload' from /usr/lib/ruby/gems/1.8/gems/activerecord-2.3.5/lib/active_record/associations.rb:1250:in 'test_case' My Question is: how can I tell Rails to use my TestCase-class instead of ActiveRecord::TestCase. TestCase class: class TestCase < ActiveRecord::Base set_table_name "test_case" has_many :test_results belongs_to :component, :foreign_key => "subsystem_id" belongs_to :domain, :foreign_key => "area_id" belongs_to :use_case, :foreign_key => "use_case_id" end

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  • Can't install thin by using rubygems on Ubuntu 9.10

    - by skyfive
    How can I fix this error, and install thin or other gems? $ sudo gem install thin Building native extensions. This could take a while... ERROR: Error installing thin: ERROR: Failed to build gem native extension. /usr/bin/ruby1.9.1 extconf.rb checking for rb_trap_immediate in ruby.h,rubysig.h... *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/usr/bin/ruby1.9.1 /usr/lib/ruby/1.9.1/mkmf.rb:362:in `try_do': The complier failed to generate an executable file. (RuntimeError) You have to install development tools first. from /usr/lib/ruby/1.9.1/mkmf.rb:425:in `try_compile' from /usr/lib/ruby/1.9.1/mkmf.rb:543:in `try_var' from /usr/lib/ruby/1.9.1/mkmf.rb:791:in `block in have_var' from /usr/lib/ruby/1.9.1/mkmf.rb:668:in `block in checking_for' from /usr/lib/ruby/1.9.1/mkmf.rb:274:in `block (2 levels) in postpone' from /usr/lib/ruby/1.9.1/mkmf.rb:248:in `open' from /usr/lib/ruby/1.9.1/mkmf.rb:274:in `block in postpone' from /usr/lib/ruby/1.9.1/mkmf.rb:248:in `open' from /usr/lib/ruby/1.9.1/mkmf.rb:270:in `postpone' from /usr/lib/ruby/1.9.1/mkmf.rb:667:in `checking_for' from /usr/lib/ruby/1.9.1/mkmf.rb:790:in `have_var' from extconf.rb:16:in `' Gem files will remain installed in /var/lib/gems/1.9.1/gems/eventmachine-0.12.10 for inspection. Results logged to /var/lib/gems/1.9.1/gems/eventmachine-0.12.10/ext/gem_make.out Addtional Infomation as below $ cat /etc/issue Ubuntu 9.10 \n \l $ dpkg -l | grep ruby ii libreadline-ruby1.9.1 1.9.1.243-2 Readline interface for Ruby 1.9.1 ii libruby1.9.1 1.9.1.243-2 Libraries necessary to run Ruby 1.9.1 ii ruby1.9.1 1.9.1.243-2 Interpreter of object-oriented scripting lan ii ruby1.9.1-dev 1.9.1.243-2 Header files for compiling extension modules ii rubygems1.9.1 1.3.5-1ubuntu2 package management framework for Ruby librar $ ruby -v ruby 1.9.1p243 (2009-07-16 revision 24175) [x86_64-linux] $ gem list *** LOCAL GEMS *** rack (1.1.0) sinatra (1.0)

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  • HTML tidy/cleaning in Ruby 1.9

    - by Christian
    I'm currently using the RubyTidy Ruby bindings for HTML tidy to make sure HTML I receive is well-formed. Currently this library is the only thing holding me back from getting a Rails application on Ruby 1.9. Are there any alternative libraries out there that will tidy up chunks of HTML on Ruby 1.9?

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  • How to install a downloaded Ruby gem file ?

    - by JCLL
    How does "gem install" works ? It is not intuitive... My gem is really here : [root@localhost Téléchargement]# ll *.gem -rw-rw-r-- 1 jean jean 16353818 mar 5 11:39 ruby-processing-1.0.9.gem But an idiomatic "gem install" does not see it... [root@localhost Téléchargement]# gem install ruby-processing-1.0.9.gem ERROR: could not find gem ruby-processing-1.0.9.gem locally or in a repository What's wrong with that ? Thx JC

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  • How to start Rails from a shell script on Debian?

    - by dsp_099
    I don't really have any need to mess with passenger or capistrano at the moment. I simply want to run rails on boot on port 3000. I've attempted to replicate this tutorial for node as much as I could to run rails: I've a railsup script in /etc/init.d/ that goes something like: #!/bin/sh export PATH=$PATH:/usr/local/bin case "$1" in start) cd /root/rails_app; /usr/local/rvm/gems/ruby-2.0.0-p247/bin/rails server -d -p 3005 ;; # starting other stuff *) I've also included it with update-rc.d I got it to work, but only if I run the script manually - it doesn't seem to run on boot. Is there any reason why ../bin/rails is unavailable on boot? I imagine there's something about ruby path \ rvm \ rails that I'm unaware of? Is there a way to use crontab's @reboot for this?

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  • Linux: find thin server running on port 80 and kill it

    - by Andrew
    On my Linux server I ran: sudo thin start -p 80 -d Now I'd like to restart the sever. The trouble is, I can't seem to get the old process to kill it. I tried: netstat -anp But what I see on port 80 is this: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN - So, it didn't give me a PID to kill... I tried pgrep -l thin but that gave me nothing. Meanwhile pgrep -l ruby gives me like 6 processes running. I don't really understand why multiple ruby threads would be running, or which one I need to kill... How do I kill / restart the thin daemon?

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  • 403 Forbidden

    - by demas
    Here is my Nginx config: user pass users; worker_processes 1; events { worker_connections 1024; } http { passenger_root /usr/lib64/ruby/gems/1.8/gems/passenger-3.0.7; passenger_ruby /usr/bin/ruby; include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; server_name some.another.ru; root /www/public/redmine; passenger_enabled on; rails_env development; } } Here is Nginx log: 2011/06/02 12:53:57 [error] 45986#0: *1 directory index of "/www/public/redmine/" is forbidden, client: **.*.**.***, server: some.another.ru, request: "GET / HTTP/1.1", host: "some.another.ru" 2011/06/02 12:53:59 [error] 45986#0: *1 open() "/www/public/redmine/favicon.ico" failed (2: No such file or directory), client: **.*.**.***, server: some.another.ru, request: "GET /favicon.ico HTTP/1.1", host: "some.another.ru" What is the reason of this error and how can I fix it?

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  • Differing packages between Ubuntu 9.04 and 9.10

    - by bergyman
    So I've been playing around with VirtualBox and both of the above Ubuntu versions and I've noticed that there are some differences between the available packages when doing a apt-cache search <package>. Some of these I'm sure are obvious, as they potentially only work on their respective systems. But I've noticed specifically several ruby packages differ. So my question is whether or not there's a way to get some of the ruby packages (ruby1.9.1-full for example) which only seem to be available on 9.10 (yup, I did a sudo apt-get update on both 9.10 and 9.04) on my 9.04 system? Is there a way I can just do a kernel upgrade on 9.04, or whatever else may be needed in order to get at these more recent packages?

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  • Setting up autotest with rspec in ubuntu

    - by Reactor5
    I'm trying to set up autotest on Ubuntu, and no matter what my configuration, I get this: loading autotest/rails_rspec2 style: RailsRspec2 /home/brian/.rvm/gems/ruby-1.9.2-rc2@rails3tutorial/gems/redgreen-1.2.2/lib/redgreen/autotest.rb:6:in `<top (required)>': uninitialized constant Object::PLATFORM (NameError) the .autotest (~/.autotest) file I have is as follows: #!/usr/bin/env ruby require 'redgreen/autotest' def self.notify title, msg, img, pri='low', time=3000 `notify-send -i #{img} -u #{pri} -t #{time} '#{msg}'` end Autotest.add_hook :ran_command do |at| results = [at.results].flatten.join("\n") output = results.slice(/(\d+)\s+examples?,\s*(\d+)\s+failures?(,\s*(\d+)\s+not implemented)?(,\s*(\d+)\s+pending)?/) folder = "~/Pictures/autotest/" if output =~ /([123456789]|[\d]{2,})\sfailures?/ notify "FAIL:", "#{output}", folder+"rails_fail.png", 'critical', 10000 elsif output =~ /[1-9]\d*\spending?/ notify "PENDING:", "#{output}", folder+"rails_pending.png", 'normal', 10000 else notify "PASS:", "#{output}", folder+"rails_ok.png" end end what am I doing wrong here?

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  • Unicorn 3 throwing tons of errors (Rails 3.0.3, Unicorn 3.0)

    - by ulf
    I just tried to upgrade to Unicorn 3.0. I changed my Gemfile and did a bundle install. When restarting my Unicorn I got tons of errors beginning with: Unhandled listen loop exception #<Errno::ENOSYS: Function not implemented - accept>. /usr/lib/ruby/gems/1.8/gems/unicorn-3.0.0/lib/unicorn/http_server.rb:593:in `kgio_tryaccept' I’m on Ubuntu 10.04. And, can anyone explain to me why the heck I can’t use an older version of a Gem than the most recent installed? After getting the errors above I just changed the version number of Unicorn in my Gemfile to 1.1.4. But this didn’t solve the problem, Ruby told me that You have already activated unicorn 3.0.0, but your Gemfile requires unicorn 1.1.4. Consider using bundle exec. (Gem::LoadError) Do I really have to? Thanks in advance for your help, guys.

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  • Cucumber Makes Behavior-Driven Ruby on Rails Development Cool

    <b>WDVL:</b> "This article introduces the Cucumber framework, a tool for implementing the Behavior-Driven Development (BDD) methodology. The idea behind BDD is simple: everyone should understand the system features. Cucumber promotes this idea by enabling the features of a system to be written in the native language of the program as either specs or functional tests."

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  • Error running phusion passenger in standalone mode

    - by msidell
    I'm trying to run standalone phusion passenger so that I can run different ruby rvm configurations on the same host. I already have ruby and passenger running fine on this host. I am following the instructions here. When I run standalone passenger the first time, it appears to successfully install nginx. But then when it tries to run, I get this error: [root@clark directra]# passenger start -a 127.0.0.1 -p 3001 -d --user dweb *** ERROR *** Could not start Passenger Nginx core: nginx: [alert] could not open error log file: open() "/tmp/passenger-standalone.16757/logs/error.log" failed (2: No such file or directory) nginx: [alert] Unable to start the Phusion Passenger watchdog (/var/lib/passenger-standalone/3.0.11-x86-ruby1.9.3-linux-gcc4.1.2-1002/support/ agents/PassengerWatchdog): Permission denied (13) (13: Permission denied) Stopping web server... done FWIW, /tmp is writeable. Any idea what's wrong?

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  • How to stop basic Postfix after-queue script from BCC-ing sender?

    - by mjbraun
    I'm building a content filter for Postfix (2.9.3 package installed via apt on an Ubuntu 12.04 test VM) and I'm starting with a very basic Ruby (1.9.3) template and building up functionality. Strangely, when the script is enabled, messages sent are being forwarded on as normal, but also sent back to the sender which is not normal. Disabling the script disables this behavior. Any suggestions about what I have to change to stop that from happening? Thanks for any advice! /etc/postfix/master.cf (only the lines changed from the default) smtp inet n - - - - smtpd -o content_filter=dumper:dummy ... dumper unix - n n - 10 pipe flags=RF user=mailuser argv=/home/mailuser/mailfilter/dumper.rb ${sender} ${recipient}` /home/mailuser/mailfilter/dumper.rb #!/usr/bin/env ruby require 'open3' dir="/home/mailuser/emails" logfile="maillog.log" message = $stdin.read cmd = "/usr/sbin/sendmail -G -i #{ARGV[0]} #{ARGV[1]}" stdin, stdouterr, wait_thr = Open3.popen2e(cmd) stdin.print(message) logfile = File.open("#{dir}/#{logfile}", 'a') logfile.write(stdouterr) stdin.close stdouterr.close exit(0)

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  • More Sessions At Central Coast Code Camp, Ruby/Cloud Computing

      Should Your Application Run In The Cloud Im back and sitting in Steve Evans Session, Should Your Application Run In The Cloud.  Hes now explaining how computers, since the stone age,... This site is a resource for asp.net web programming. It has examples by Peter Kellner of techniques for high performance programming...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • rails didnt install correclty, specificly the uninstaller

    - by sam
    ive just installed rails using railsinstaller.org for osx, rails and ruby seem to be working ok (checked by running rails -v and ruby --version). But when it installed i got an error saying that not there were errors and the uninstaller didnt install correctly. Somthing odd i saw was that when i load terminal i get this showing up Last login: Fri Nov 30 13:12:09 on ttys000 unknown5c969d7cc475:~ Sam$ specificly the "unknon5c96..." part im not sure if its related ? I think i might have got the install error as xcode wasnt installed first, for peice of mind id like to unistall it and load it back on, but when i try and run the installer from the application folder it just asks for my password and then dose nothing.. any ideas how i can fix this ?

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  • Install Rails on linux [migrated]

    - by Jseb
    I am trying to install Ruby on Rails. and i have followed the following link for the install https://www.digitalocean.com/community/articles/how-to-install-ruby-on-rails-on-ubuntu-12-04-lts-precise-pangolin-with-rvm. This link was helpful i was able to run it, and everything, however as soon has i restarted the computer i then go into my apps and run it again with rails s and this message occurs. The program 'rails' is currently not installed. You can install it by typing: sudo apt-get install rails But work before, what should i do, do i need to set the path of somesort?? I am not that great in linux so bear with me. I am using linux ubuntu 12.04 desktop and my user is john Thanks in advance

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  • Passenger 'premature end of script headers' error

    - by fatnic
    Hi. I really need help debugging an error I'm getting with Passenger on Apache. I've just made a fresh install of Ubuntu 10.4 and have Apache, Ruby and Passenger installed. I'm trying to run a simple rack app but keep getting this error in my Apache error.log [Tue Sep 28 05:54:41 2010] [error] [client 86.171.2.82] Premature end of script headers: The error then continues with The backend application (process 25574) did not send a valid HTTP response; instead, it sent nothing at all. It is possible that it has crashed; please check whether there are crashing bugs in this application. *** Exception NoMethodError in PhusionPassenger::Rack::ApplicationSpawner (undefined method `call' for nil:NilClass) (process 25574): I've tried older versions of passenger also but get the same error. Ubuntu 10.4 Apache 2.2.14 Ruby 1.9.2-p0 Passenger 2.2.15

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  • When/how to use Node with PHP or Ruby [closed]

    - by mbuurman
    For fun, I am creating a sort of microblogging webapp where people can comment on certain things. The basic "What is your opinion on this?" should be easy doable with just PHP (input the data in the database). Along with that I want to create a statistics page, also easy doable with PHP. But what if I want to update that page in realtime? How would I integrate Node on that page? Or shouldn't I use Node for that? When would you use Node?

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