jruby

问题 I'm building an application using JRuby and Warbler to package it. My problem is that I want to get the path of the jar file that is currently running, without writing java... 回答1: Does RbConfig::CONFIG["bindir"] have what you want? $ java -cp Development/src/jruby/lib/jruby-complete.jar org.jruby.Main -e 'require "rbconfig"; p RbConfig::CONFIG["bindir"]' "file:/Users/asari/Development/src/jruby/lib/jruby-complete.jar!/META-INF/jruby.home/bin" 来源： https://stackoverflow.com/questions/8743854

问题 I have the following variable defined in my Rails controller: $PATH In JavaScript I would like to change the value of this variable: <script> $("#resetDefaults").click(function(){ $PATH = '3'; //try 1 <%= $PATH %> = '3'; // try 2 }); </script> I have tried both of the above statements and can't figure out how to do it. 回答1: A global variable is only global in the Ruby code that is executed on the server . You're running JavaScript code in the browser. That code has no direct access to

问题 This error comes up in Redhat Enterprise Linux Server 5.4 - 64 bit. Linux rhl-64-tibbr5 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux There is also this error in the stack trace. uninitialized constant Nokogiri::VERSION_INFO More version details: jruby-1.4.0RC1 ruby/gems/1.8/gems/activesupport-2.3.4 Any idea? 回答1: After wasting a few hours on this issue, we realized we didn't need nokogiri in our application. So we got it rid of it and these errors

问题 I'm struggling for many hours now using activerecord-jdbcmssql-adapter with Rails 5.1 (or 5.2). I've installed ant to be able to compile the gem during the bundling. The bundle process runs fine but when I want to start rails I'm just getting Bundler::GemRequireError: There was an error while trying to load the gem 'activerecord-jdbcmssql-adapter'. Gem Load Error is: undefined method `type_cast_from_database' for class `ArJdbc::MSSQL::UUIDType' I've googled a lot but didn't find a solution or

问题 I've created jar file from ruby code using warbler. File structure within jar is as below: core.jar ----core --------lib ------------gui.class ------------gui.rb I've other java application from which I want to run "connect" function which is in Gui class of gui.rb. I've tried below code in java: ScriptingContainer SCRIPTING_CONTAINER = new ScriptingContainer; // String CORE_JAR_PATH = "core.jar"; String CORE_JAR_PATH = "core.jar!/core/lib"; SCRIPTING_CONTAINER.getLoadPaths().add(CORE_JAR

问题 This question links to my earliest Question here. I have a model "User" and scaffold "ContactDetail" which relate to each other as below. Each User has_many ContactDetail ContactDetail belongs_to User My Question How can I load all the contact details to my html upon successful login? If user is a new user and has no contact details so far, I want to show contact_details' new.html.erb inside my html. Can I do that? This is what I tried so far In my login sessioncontroller.rb I create

问题 I have a jar named test.jar which contains following java classes: Test.java package test; import java.lang.reflect.Method; public class Test { public static void yoyo(Object o) { Method[] methods = o.getClass().getMethods(); for (Method method : methods) { CanRun annos = method.getAnnotation(CanRun.class); if (annos != null) { try { method.invoke(o); } catch (Exception e) { e.printStackTrace(); } } } } } and interface CanRun.java package test; import java.lang.annotation.ElementType; import

问题 I am trying to download gems for jruby-1.7.0.RC2 but i get this error every time I try to push it through. Error: Your application used more stack memory than the safety cap of 2048K. Specify -J-Xss####k to increase it (#### = cap size in KB). Specify -w for full StackOverflowError stack trace 回答1: If you are using RVM to manage your Ruby runtimes, be sure to update it. See https://github.com/jruby/jruby/issues/331. 回答2: That because Everytime you run gem install rails it check for capsize

问题 Is it possible to compile all .rb source files files (including the configuration source file files) of Ruby on Rails to .class files using JRuby, pack it into a .war file and deploy to JBoss or another Java appserver? 回答1: Check out warbler for this purpose. From the main page: Warbler is a gem that makes a .war file out of a Rails, Merb, or Rack-based application. The intent is to provide a minimal, flexible, ruby-like way to bundle all your application files for deployment to a Java

问题 This is the description of Kernel#__method__ according to Ruby-Doc.org (emphasis added): Returns the name at the definition of the current method as a Symbol. If called outside of a method, it returns nil . Now consider the following code snippet: DEFINITION = proc { __method__ } class C define_method :one, DEFINITION define_method :two, DEFINITION end o = C.new When I run the following using MRI v1.8.7+ I'm getting the expected results: o.one #=> :one o.two #=> :two However when I run the